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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 610405: -4x+3y=6
y=4/3x-5
--- How many solutions does this system of linear equations have?
Click here to see answer by Alan3354(30993)

Question 610264: Find an equation of the line L that passes through the point
(−2, 6)
and satisfies the given condition. (Let x be the independent variable and y be the dependent variable.)
The x-intercept of L is 5.
Click here to see answer by ankor@dixie-net.com(15667)

Question 610513: Christine went shopping and bought each of her 9 nephews a gift, either a video costing 14.95. Or a cd costing 16.88. She spent 148.06 on the gifts. How many videos and how many cd's did she buy?
Click here to see answer by scott8148(6628)

Question 610579: how do i graph linear equations? grahing is so difficult for me and I hate to see it when I'm doing trigenometry or something like that. Please teach me. how do you solve this question:
y=-2x+1
y=x-5
Click here to see answer by stanbon(57424)

Question 610786: Which graph correctly shows the solution to this equation?
5y – 2x = 25

Click here to see answer by solver91311(16897)

Question 611022: Use the method of substitution to solve the system of linear equations.
2x-y=6
7x-3y=23
Click here to see answer by stanbon(57424)

Question 611058: please help me find the value of c
9x+cy=-16
6x-8y=-13
Click here to see answer by radh(108)

Question 611103: please help me solve this linea equation
10x+3y=27
3x-5y=73
find x and y

Click here to see answer by lynnlo(4164)

Question 611280:
Please answer immediately, I need this by Friday.:)
Click here to see answer by richwmiller(9143)

Question 611513: I am lost on this equation solution. I got the answer from the answer sheet but still can't figure out how to get there.
x/3 + y/6 = 1
x/2 - y/4 = 0
answer is 3/2, 3
How?
Click here to see answer by richard1234(5390)

Question 611900: I need help on solving linear equations by elimination by promblem is solv ing this equation : 5(2x-y)=x+20
3x+8=4x-2y please help me solve it!!!!! Its hard
Click here to see answer by Maths68(1474)

Question 612439: The smaller of two numbers is 9 less than the larger, and their sum is 38. Find the numbers.
Click here to see answer by ewatrrr(10682)

Question 612623: Divide 184 into two parts such that 1/3 of one part may exceed 1/7 of the other part by 8.
Click here to see answer by stanbon(57424)

Question 612625: The sum of two numbers is 9 and their difference is 6. What are the two numbers?
Click here to see answer by nerdybill(6963)

Question 612690: How do I solve this system?
y=5/2x-3
y=-1/2x+3
Click here to see answer by Alan3354(30993)

Question 612624: At a party, Colas, squash and fruit juice were offered to the guests. One fourth of the guests drank cola, one third drank squash, two fifths drank fruit juice and 3 people did not drink anything. How many guests were there in the party?
Click here to see answer by richwmiller(9143)

Question 613322: I'm stuck on the following question: Last month Darlene earned $32 per day and Lisa earned $36 per day. Together they earned a total of $1180. How much did each earn if Darlene worked 5 more days than Lisa?
Click here to see answer by ewatrrr(10682)

Question 613662: how do i solve 2x > -30?
Click here to see answer by radh(108)

Question 613673: The solution of the system { 2x + y = 13, 5x - 2y = 19 } is (5, 3). How are the graphs of the 2 equations related?
Click here to see answer by solver91311(16897)

Question 613728: The question is "Find the slope of the line through each pair of points" (2,-4) & (-3,-4) I need help on figuring it out.
Click here to see answer by jim_thompson5910(28598)

Question 613729: "Find the slope of each line"
y= 4/3x -2
what are the steps to solve the solution?
Click here to see answer by jim_thompson5910(28598)

Question 613769: find the intercepts for the equation
3x+y=-7
x-intercept:
y-intercept:
Click here to see answer by jim_thompson5910(28598)

Question 613769: find the intercepts for the equation
3x+y=-7
x-intercept:
y-intercept:
Click here to see answer by stanbon(57424)

Question 613778: Find the slope of each line
through (-2,3) & (5,-6)
i think i subtract the y & x1's to the y & x2's but dont know where to go from there.. help please
Click here to see answer by jim_thompson5910(28598)

Question 613788: "Find the slope of each line"
6x-2y=5
i dont know if i was supposed to plug in the zero even though there already is a number. help?
Click here to see answer by scott8148(6628)

Question 613791: determine weather the two lines are parallel perpendicular or neither
2x+2y=7
2x-2y+5
Click here to see answer by scott8148(6628)

Question 613841: If there is no solution or infinitely many solutions, state so. Put the value for x in the blank:
2x + 3y = 9; 11x + 7y = 2
To solve for x, I keep getting 4 but I am thinking this is not correct.
Can you help?
Click here to see answer by scott8148(6628)

Question 614217: Elimination
4x-6y=3
6x-4y=-3
Click here to see answer by stanbon(57424)

Question 614218: Elimination
8s+12t=16
6s+9t=12
solve
Click here to see answer by richwmiller(9143)

Question 614383: A company produces a product which it sells for $55 per unit.each unit cost the firm $23 in variable expenses,and fixed costs on an annual basis are $400,000.
if x equals the number of units produced and sold during the year:
(a) formulate the linear total cost function.
(b)formulate the linear total revenue function.
(c)formulate the linear profit function.

Click here to see answer by bucky(2189)

Question 614468: Does the following have a question have unique solution? Why?

[ 4x - 6y = -7
-2x + 3y =18
Click here to see answer by Alan3354(30993)

Question 614461: find th y intercept
4x-y=0
Click here to see answer by Alan3354(30993)

Question 614452: 10.) "find the slope of the line through each pair of points"
(3, -1) & (2,1)

i tried doing y2-y1/x2-x1 formula but I'm not sure if the answer is -2 / 1
Click here to see answer by richwmiller(9143)

Question 614544: 2x – 5y = -1
x – 3y = -3

Click here to see answer by sophxmai(60)

Question 614619: (-3, ___) is a solution of y = 4 - 3x
Now what I have tried is:
y = 4 - 3(-3)
y = 4 - -9
y = -5
So then I
y = 4 - 3(5)
y = 4 - 15
y = 9
I can't figure out this problem and I still don't understand how to come up with the two numbers needed
Click here to see answer by stanbon(57424)

Question 614903: Given info: y= 2x+1 y=2x-1
Is there a common solution for this problem?
Click here to see answer by Alan3354(30993)

Question 614288: Using the equation: 2x - y = 4
What is the x-intercept, y-intercept, and slope of this line?

Click here to see answer by asuar010(324)

Question 614404: what is the equation that is parallel to 3x-2y=4 and passes through the origin?
Click here to see answer by asuar010(324)

Question 615318: can you please help me with this
solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions state this.
11x+8y=103
22x-7y=68
Click here to see answer by Alan3354(30993)

Question 614552: Can someone please help me with the

2x – 5y = -1
x – 3y = -3

Click here to see answer by asuar010(324)

Question 615595: how to solve y+4=x^2+x algebraically?
Click here to see answer by stanbon(57424)

Question 615646: 7x+6+x>5x+10 write solution set in interval notation and graph
Click here to see answer by jim_thompson5910(28598)

Question 615986: we are working on systems of linear equations in two variables.
Solve ( I have no idea):
10x-2y=4
3x-6y=12
Click here to see answer by JBarnum(2044)

Question 616149: x+y=4
x-y=8
which of the 3 methods (graphing, substitution, or elimination) would you use to solve this linear system,
Click here to see answer by Alan3354(30993)

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