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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 758526: solve the system by graphing
x-y=1
2x+3y=17
Click here to see answer by Alan3354(69443)

Question 758466: kx+y+z=1
x+ky+z=1
x+y+kz=1
find
the value of k
Click here to see answer by ankor@dixie-net.com(22740)

Question 758679: x+y=7
x-9y=-13
Click here to see answer by Cromlix(4381)

Question 758679: x+y=7
x-9y=-13
Click here to see answer by lynnlo(4176)

Question 758679: x+y=7
x-9y=-13
Click here to see answer by stanbon(75887)

Question 758899: 6x - 5y = 3
4x + 3y = 21
Using the Substitution Method, please help me figure out how to show my work when solving.
Click here to see answer by fcabanski(1391)

Question 758930: 2-3j/5=3-4j/6
Click here to see answer by Menjax(62)

Question 758929: 4(2y+3)/5= 5(2-y)/2
Click here to see answer by Cromlix(4381)

Question 759008: How many solutions will a system have if the graph of the solution is parallel lines? x-2y=-6
x-2y=2
Click here to see answer by Alan3354(69443)

Question 759080: Solve the system of equations
5x + 2y = 8
12x + 6y = 20

Click here to see answer by Alan3354(69443)

Question 759080: Solve the system of equations
5x + 2y = 8
12x + 6y = 20

Click here to see answer by jim_thompson5910(35256)

Question 759227: one apple cost 5rs.one orage cost1 rs.one lemon cost .10 rs.the nom of items equal to total cost.what is the total co
st

Click here to see answer by Cromlix(4381)

Question 759637: Solve the system of equations and give value for x:
-5x = -10 - 5y
3x + 2y =16
Please help with this. Thanks.
Click here to see answer by stanbon(75887)

Question 759635: Solve for x:
4x + 2y =14
x=3y
Please show steps. Thank you.
Click here to see answer by stanbon(75887)

Question 759645: Solve the system of equations and give the value of x:
3x + 12y = 9
x = -4y - 3
Please show details thank you so much.
Click here to see answer by oscargut(2103)

Question 759644: How do i check to see if the problem 3x+10=25 is right?
Click here to see answer by Alan3354(69443)

Question 759643: Solve the system of equations and give the value of x:
4x + 5y =6
15y + 18 - 12x
Please show how you arrived at answer: Thank you
Click here to see answer by stanbon(75887)

Question 760279: y x 1/2 - 3 =9
Click here to see answer by Alan3354(69443)

Question 760324: How can I determine graphically the x-value when y=1 in this equation
-x+3y=6?
What does x equal?
Click here to see answer by josgarithmetic(39617)

Question 760324: How can I determine graphically the x-value when y=1 in this equation
-x+3y=6?
What does x equal?
Click here to see answer by stanbon(75887)

Question 760366: in a lab experiment 12 grams of acid were produced in 27 minutes and 20 grams in 50 minutes. find a linear equation that models the number of grams produced in x minutes.
Click here to see answer by josmiceli(19441)

Question 760343: please help me with this problem! ): I don't know how to do this.
An 11% salt solution was mixed with an 18% salt solution to make 20L of a 16% solution. How many liters of 11% salt solution were required?
Click here to see answer by josgarithmetic(39617)

Question 760669: x+y+z=6
2x-y+z=3
3x-z=0
Click here to see answer by tommyt3rd(5050)

Question 760725: please show me step by step how to solve these simultaneous equations using the substitution method :
x-8=2y and x+y=-2
Click here to see answer by ramkikk66(644)

Question 760845: how do I solve this question: x+y=5 y=2x-1

Click here to see answer by rfer(16322)

Question 760954: find the inverse of the function f(x)=3x-1/4

Click here to see answer by Leaf W.(135)

Question 761171: -x+3y= -3 I need to solve for y
Click here to see answer by MathLover1(20850)

Question 761171: -x+3y= -3 I need to solve for y
Click here to see answer by solver91311(24713)

Question 761183: 1.what is the solution to this linear system ?
2x+5y=-1
15x-5y=-50

Click here to see answer by solver91311(24713)

Question 761266: 3x^2-xy=0, 2y-5x=1
Click here to see answer by stanbon(75887)

Question 761287: How do you solve
x=3
2y+x=3
Click here to see answer by Alan3354(69443)

Question 761340: Hi could you please show the steps to working out these simultaneous equations:
1/2 x + 2/3 y = 6 1/5 and
3/4 x + 1/7 y = 1 3/5
thank-you

Click here to see answer by Alan3354(69443)

Question 761397: x+7y=-37
2x-5y=21
how do i solve this by using the method of elimination. If Step by step process would be shown, it would be greatly appreciated.
Thank you :)
Click here to see answer by Alan3354(69443)

Question 761473: what is -3>-3t+6
Click here to see answer by DrBeeee(684)

Question 761527: how to simplify an expression of 16 1/2
Click here to see answer by stanbon(75887)

Question 761720: When will the parabola cross the x-axis with the equation y = 1/2 x-squared + 4x -2?
Click here to see answer by ramkikk66(644)

Question 761952: Please help me to solve this problem
How much water must be added to 6 gal of a 4% insecticide solution to reduce the concentration to 3%? (Hint : water is 0% insecticide)
Click here to see answer by Alan3354(69443)

Question 762032: Solve A=xy+2 for the variable x
Click here to see answer by Alan3354(69443)

Question 762055: Solve this system
2x � y = 7
3x + y = 8
Click here to see answer by tommyt3rd(5050)

Question 762080: Use the elimination method to solve the system of equations
a+9b=22
a+4b=7
A. There is one solution is ____(simplify your answer. Typed an ordered pair)
B. There are infinitely many solutions
C. There is no solution.
Click here to see answer by tanjo3(60)

Question 762270: {x-y=-3 2x+y=12
Click here to see answer by Alan3354(69443)

Question 762331: My friend and I have different calling plans. Mine has a monthly fee of $15 and $0.05 per minute charge. My friend pays $0.02 a minute and a $20 monthly customer fee.
After how many minutes will our plans cost the same amount? Round your answer to the nearest minute.
Click here to see answer by ramkikk66(644)

Question 762860: Easy Word Problem
Two rectangles have the same area of 120m^2. the difference of their length 5m and their breadth is 4m find their sides
Please solve it in manner like let........be x
and let...........be y
Please Help Thank you in advance
Click here to see answer by josmiceli(19441)

Question 762862: how can i solve the equations 72x+50y=9xy & 90x+70y=12xy

Click here to see answer by Alan3354(69443)

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