Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 916611: What does x equal in 2x^2+3x-9=0?
Click here to see answer by ewatrrr(24785)

Question 917319: my math question is like this
1/2[x -1/6]+2/3=5/6+1/3[1/2-3X]
Click here to see answer by KMST(5328)

Question 917320: my math question is like this
1/2[x -1/6]+2/3=5/6+1/3[1/2-3X]
I WANT MY ANSWERED SOON PLZ
Click here to see answer by rothauserc(4718)

Question 917949: 7x-6y=-12
6x+7y=99
The directions are solve by the elimination method.
I have tried by multiplying the top equation by 7 and the bottom by 6 since there was already a negative on top. I then got 49x-42y=-84 and 36x+42y=594 . I then added them together and got 85x=510 which equals x=6. Then I plugged 6 in for x In the equation 7x-6y=-12 and got y=-9.
But when I put in the answer in mathxl, it said it was wrong. Please help me figure out what I did wrong and understand how to work this problem.
Click here to see answer by KMST(5328)

Question 918008: a student wrote y - 6 = 2(x - 5). How can she fix this to write the correct equation?

Click here to see answer by josgarithmetic(39617)

Question 918082: Solve the following system of linear equations:
x+4y+3z=12
-3x-11y-8z=-34
3x+6y+3z=24

Click here to see answer by richwmiller(17219)

Question 918268: This is a Cluster 2.
I do homeschooling on Ecot but i need help with the problem
Is (-1,-2) a solution to the system of equations below?
4x + y= -6
2x + 4y= -10
Click here to see answer by Alan3354(69443)

Question 918392: Jane invests $9,885 into two accounts. A savings account earns 6% interest , while a money market account earns 9.5% interest. After one year she made $696.35 interest from both accounts . How much did she invest into each account?
Click here to see answer by stanbon(75887)

Question 918460: Identify the solution(s) of the system of equations, if any.
-3x-4y=2
8y=-6x-4
Click here to see answer by MathLover1(20850)

Question 918595: Using substitution, identify the ordered pair that is not an element of the solution set of the system of equations.
6x + 3y = 6
2x + y = 2
Options:
(0, 2)
(1, 0)
(−2, 0)
(2, −2)
Click here to see answer by ewatrrr(24785)

Question 918596: At a grocery store, Rick bought 4 loaves of bread and 3 gallons of milk for $20. Danny bought 6 loaves of bread and 2 gallons of milk for $25. Identify the cost of a loaf of bread and a gallon of milk.
Click here to see answer by ewatrrr(24785)

Question 918659: 3x+10≥4
Click here to see answer by Fombitz(32388)

Question 918804: How do you solve this system of linear equations problem in substitution method?
2x - 5y = 13
3x + 4y = -15
Click here to see answer by josgarithmetic(39617)

Question 919084: find the area of triangle formed by the line 3x+5y=15, x-y =5 and the y axis

Click here to see answer by ewatrrr(24785)

Question 919174: -6x-3y=18 and 9y=-18x-54
Click here to see answer by ewatrrr(24785)

Question 919182: I has this question in my textbook that has a graph and says " a point is missing from the graph of the relationship at the right . The relation is not a function. Which point is missing ?
Click here to see answer by richard1234(7193)

Question 919202: If 3^a-b= 27 and 3^a+b=243 what is the value of a? I have the answer a-b=3 and a+b=5 and if you add the equations together 2a=8 so a =4 but don't understand why.
Click here to see answer by richard1234(7193)

Question 919132: -11<4y-3<1 solve for y
Click here to see answer by jim_thompson5910(35256)

Question 919406: how do I solve the problem 7(6+x)=6(2+x)
Click here to see answer by rfer(16322)

Question 919412: can you show me how to solve the problem -3(x-4)=-4x
I came up with -3x+12=-4x and now I'm lost Please help me.
Click here to see answer by MathLover1(20850)

Question 919988: How to solve this? our lesson is about elimination.
1) 3x+y= 2
9x+2y= 7
2) x-y=- 7
3x+y= 19
3) 4x+y= 6
x-2y= 15
4) 2x+y= 10
4x+2y= 5
5) -x+3y= -2
-3x+9y= -6
Click here to see answer by Fombitz(32388)

Question 920193: 75 people attended a baseball game. Everyone there was a fan of either the home team or the away team. The number of home team fans was 90 less than 4 times the number of away team fans. Find the number of each team fans.
Click here to see answer by ewatrrr(24785)

Question 920202: The length of a rectangle is equal to triple the width. The perimeter is 86 centimeters. Find the length and width.
Click here to see answer by ewatrrr(24785)

Question 920282: Please help me with solving:
2x-y=1
4x-2y=2
Click here to see answer by mananth(16946)

Question 920282: Please help me with solving:
2x-y=1
4x-2y=2
Click here to see answer by richard1234(7193)

Question 920431: how do i graph the following system of inequalities:
y -3x + 1
y x + 3

Click here to see answer by Fombitz(32388)

Question 920430: Which of the following points lie in the solution set to the following system of inequalities?
y > -3x + 3
y > x + 2
(2, -5) (-2, 5) (2, 5) (-2, -5)
Click here to see answer by ewatrrr(24785)

Question 920569: Kristin spent $131 on shirts. Fancy shirts cost $28 and plain shirts cost $15. If she bought a total of 7 then how many of each kind did she buy?
Click here to see answer by ewatrrr(24785)

Question 920545: Use the system to answer the question. x+5y=-3
2x+7y=3

Which is the solution to the system?
(Points : 4)
(13, 2)
(2, 1)
(12, 3)
(22, 5)
Click here to see answer by MathLover1(20850)

Question 920571: The sum of two numbers is 90. The larger number is 14 more than 3 times the smaller number. Find the numbers.
Click here to see answer by Hawksfan(61)

Question 920661: I need help
Click here to see answer by MathLover1(20850)

Question 920927: Is 2,1 a solution to this system of equations
2x - 4y = 8
4x + 3y = 5
Click here to see answer by ewatrrr(24785)

Question 920927: Is 2,1 a solution to this system of equations
2x - 4y = 8
4x + 3y = 5
Click here to see answer by lenny460(1073)

Question 921094: I wanna know the answer to y=2-4x I got 14 and I need help showing work I don't think my answer right

Click here to see answer by Alan3354(69443)

Question 921094: I wanna know the answer to y=2-4x I got 14 and I need help showing work I don't think my answer right

Click here to see answer by josmiceli(19441)

Question 921191: Solve the linear system using elimination.
x+2y=13
x-2y=-7

Click here to see answer by MathLover1(20850)

Question 921185: Which of the following points lie in the solution set to the following system of inequalities?
y x - 5
y -x - 4
(1, 10)or(-1, 10) or (10, 1) or (1, -10)
i think its the last one but unsure
Click here to see answer by ewatrrr(24785)

Question 921268: x = 3y - 6
2x - 4y = 8
Click here to see answer by ewatrrr(24785)

Question 921311: In a rational number, twice the numerator is 2 more than the denominator. If 3 is added to each, the numerator and the denominator, the new fraction is 2/3. Find the original number.
Click here to see answer by MathLover1(20850)

Question 921476: X=2y-5 and Y=3x-5 then X+Y=?
Click here to see answer by mathsnight(4)

Question 922014: The perimeter of a triangle is 180 degrees. The largest angle is 10 degrees less than the other two. The middle sized angle is the average of the other two. Find the measures of the angles.
180 = A + B + C
C = A + B - 10
B = (A + C) / 2
Click here to see answer by richwmiller(17219)

Question 922057: Input in standard form the equation of the given line.
The line with m = -1 /2 and b = 1
Click here to see answer by ewatrrr(24785)

Question 922067: Input in standard form the equation of the given line.
The line with m = -3/2 and b = 6
Click here to see answer by ewatrrr(24785)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515