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

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Question 484920: -10x+4y=-30
5x-2y=15
Click here to see answer by jim_thompson5910(28598)

Question 484922: 2x+4y=-10
-3x-2y=-1
Click here to see answer by jim_thompson5910(28598)

Question 484926: x+2y-2z=1
7x-4y+z=11
2x-3y+2z=5
Click here to see answer by jim_thompson5910(28598)

Question 484927: 4x+2y=6
x-2y=4
Click here to see answer by jim_thompson5910(28598)

Question 485303: 4x+3y=1, 2x+5y=11 solve by elimination by subtraction
Click here to see answer by mananth(12270)

Question 485507: given the linear equation y=-4/3+1 , find the y -coordinates of the points (-6,),(-3), and (6,)
Click here to see answer by John10(245)

Question 485795: Determine if (1/2,-4) is a solution to 4x-3y=-10.
Click here to see answer by rfer(12670)

Question 485903: Bruce purchased a new computer at a 10% discount sale for $1215.00. What was the original price of the computer?
Click here to see answer by Tatiana_Stebko(1326)

Question 486163: x + 6 = 2x + 5
Click here to see answer by rfer(12670)

Question 485723: Hello my name is kevin and im an exhange student from spain can you please explain to me the process of how to solve these by graphing?
{2x+9=y
{y=-4x-3
Click here to see answer by Edwin McCravy(8909)

Question 486353: what is the slope intercept form of 7x-3y=34?
Click here to see answer by Tatiana_Stebko(1326)

Question 486572: I am trying to check my work - help
2x + 4y =50, 3x + 5 y=66
2x + 4y = 50
2x = 50 - 4y
x = 25 -2y
3(25 - 2y) + 5y = 66
75 -6y +5y =66
-y = 66 - 75 = -9, y=9
2x + 36 = 50
2x = 50 - 36 =14
x=7
Click here to see answer by deborabr(181)

Question 486957: Determine whether the system is consistent, inconsistent, or dependent
3x+ 2y = 15
6x+ 4y = 30
Click here to see answer by John10(245)

Question 487165: the question is find the solution to each system by the substitution method
2x - 5y = -1
x - 3y = -3
Click here to see answer by jorel1380(2518)

Question 487386: can someone plss help me im very stuck ?
decide whether the given ordered pair is a solution of the given system.
1. (3,-7)
5x + y = 8
2x - 3y = 28

Click here to see answer by Edwin McCravy(8909)

Question 488369: can someone please help me?
solve each system by the substitution method.
8. 2x+y-x=-3y+5
y+2=x-5

Click here to see answer by rfer(12670)

Question 489340: 2x+1=-17 the answer is -9 but i want to know which is the differences between this other equation 8x+7=-3 and the answer is 2 can you explain this to me please
Click here to see answer by rfer(12670)

Question 489547: I need help solving this equation using the substitution method. Can you please answer it as detailed as possible.
2x - 3y = 0
-4x + 3y = -1
Click here to see answer by mananth(12270)

Question 489762: According to data from a Texas agricultural report, the amounts of nitrogen (lb/acre), phosphate (lb/acre) and labor (hr/acre) needed to grow honeydews, yellow onions, and lettuce are given by the following table:

YELLOW
HONEYDEW ONIONS LETTUCE

NITROGEN 120 150 180

PHOSPHATE 180 80 80

LABOR 4.97 4.45 4.65

If a farmer has 220 acres, 29,100 pounds of nitrogen, 32,600 pounds of phosphate, and 1061 hours of labor available, can he use all of his resources completely? If so, how many acres should he allot for each crop?

We set up the initial equations:

120H + 150Y + 180L = 29,100

180H + 80Y + 80L = 32,600

4.97H + 4.45Y + 4.65L = 1061 OR 497H + 445Y + 465L = 106,100 (easier than decimals)

The instructor is working with systems of linear equations and matrices. We do not have a graphing calculator.
Thank you for your help!

Click here to see answer by chessace(471)

Question 489871: 4x=4

Click here to see answer by deborabr(181)

Question 490128: hi i want to know if you can please give me the step by step answear to this equation ive tried so many ways and i keep getting different answears [(-4+8)-(-2-3)^2]+[(-11+8-6)^2]
Click here to see answer by stanbon(57387)

Question 490530: solve by substitution method
6x+7y=14
x= 25-4y
Click here to see answer by mananth(12270)

Question 490561: Solve.
8x-(3x+6)=4
Click here to see answer by nerdybill(6962)

Question 490647: Solve. <(is less than or equal to)
-11 < 3x-4 < -3 =
Click here to see answer by Gogonati(809)

Question 490653: Solve using multiplication principle.
3 9
- ---x = - ----
4 10
Click here to see answer by Alan3354(30993)

Question 491146: 3r-2s=5 and 2r+3s=12
Click here to see answer by mananth(12270)

Question 491171: (8,9): 7x+y=3
The equation of the line is y =
Click here to see answer by Alan3354(30993)

Question 491238: I dont understand the process,
2x-y=32
y-5x=13
Click here to see answer by richard1234(5390)

Question 491238: I dont understand the process,
2x-y=32
y-5x=13
Click here to see answer by S_Marshall(1)

Question 491406: Solve the system of equations

x + 3y = 32
-3x + 2y = 3

Click here to see answer by Alan3354(30993)

Question 491410: (-6x+5y)(4a)for x=2,y=3,a=4
Click here to see answer by ptth176(50)

Question 492541: 1.(x+2)(x+3) 2.(x-2)(x+3) 3.(x-2)(x-3)
Click here to see answer by Jenn2468(1)

Question 493250: Table of value
2x-y=3

what is x value and y value
Click here to see answer by Alan3354(30993)

Question 493443: 3x/3=-19-2/3
Click here to see answer by stanbon(57387)

Question 493964: State the ordered pair that satisfies the equation 2x-5y= -1
thank you (:
Click here to see answer by richard1234(5390)

Question 494596: Solve the following systems of equations using a method of your choice.
6x-y=-4
2x=2y=15
Click here to see answer by Alan3354(30993)

Question 494754: For moving purposes, the Hendersons bought 22 cardboard boxes for $98.50. There were two kinds of boxes; the large ones cost $5.50 per box, and the small ones cost $3 per box. How many boxes of each kind did they buy?

Click here to see answer by Maths68(1474)

Question 494308: the difference between seven times one number and three times a second number is 25. The sum of twice the first and five times the second is 95. Find the numbers.

Click here to see answer by Maths68(1474)

Question 495165: what is the x and y intercepts of the equation y=16-4x^2?

Click here to see answer by rfer(12670)

Question 495775: the measure of on angle is 24 degrees greater then the measure of its complement.what are the measure of the angles?

Click here to see answer by kingme18(98)

Question 496055: Is (3, 2) a solution to this system of equations?
8x + 7y = 37
2y = 4x - 2

Click here to see answer by Alan3354(30993)

Question 496052: Does this system of equations have one solution, no solutions, or an infinite number of solutions? 2y + 8x - 12 = 0
4x + y = -6

Click here to see answer by chessace(471)

Question 496056: Does this system of equations have one solution, no solutions, or an infinite number of solutions? x + 2y = 10
4y - 20 = 2x
Click here to see answer by chessace(471)

Question 496290: A local hamburger shop sold a combined total of hamburgers and cheeseburgers on Sunday. There were more cheeseburgers sold than hamburgers. How many hamburgers were sold on Sunday?

Click here to see answer by richard1234(5390)

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