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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 701563: i need to see the work step by step for this problem (substitution method):
x=6+y
3x=-y+6
Click here to see answer by stanbon(75887)

Question 701553: (7/(2x+1))-(8x/(2x-1))=-4
Click here to see answer by Simnepi(216)

Question 701586: Please help me with this substitution problem.....
c+a=24
5c+8a=1614
Click here to see answer by stanbon(75887)

Question 701519: Can you please help me solve this linear equation using substitution
1/2x + 2/3y = 1
1/4x - 1/3y = 5/2
Thank you.

Click here to see answer by KMST(5328)

Question 701869: is the ordered pair (-9, 15) a solution to: 5x+4y=10
Click here to see answer by solver91311(24713)

Question 701947: given the pair of linear equations (A) 2x+3y=2 (B) 3x+5y=3 select the correct step in the solution of the system using elimination also known as combination.
A) Multiply equation (A) by 3 and multiply equation (B) by 2 then add (A) and (B)
B) Multiply equation (A) by 3 and multiply equation (B) by -2 then add (A) and (B)
C) Subtract 3y from both sides of equation (A), then divide the equation by 2
D) Any of the above answers is correct.
E) None of the above is the correct procedure.
I have been stuck on this one question for 5 min now and I cant figure it out will you help me please.
Click here to see answer by solver91311(24713)

Question 701995: What does the x represent in this situation 3x=-4y-21 and 5x+7y=39?
Click here to see answer by stanbon(75887)

Question 702042: 3x+y=10
y=-3x+4
what is the salution to rhis sytem
a. no solution
b.inf.m.sol
c.1,7
d. -1,7
Click here to see answer by RedemptiveMath(80)

Question 702085: Can you please help me solve this linear equation using substitution.
1/2x + 3y = 5/6
1/3x - 5y = 16/9
Thank you.

Click here to see answer by sofiyac(983)

Question 702086: Write an equation in slope-intercept form for the line that passes through (4,6) and is perpendicular to the line given by y=x-3
Click here to see answer by josgarithmetic(39617)

Question 702121: For which 5-years time period was the rate of change the greatest? the least?
Algebra 1
Mid Chapter Quiz
Chapter 4, Page. 212
Click here to see answer by Alan3354(69443)

Question 702135: Please help me with Algebra 1
Mid chapter Quiz
Page 212
number 13-15
It's said Suppose you have already saved $75 toward the cost of a new television.
You plan to save $5 more each week for the next several weeks.
13. Write an equation for the total amount T you will have w weeks from now.
14. Graph the equation.
15. Find the total amount saved after 10 weeks.

Click here to see answer by sofiyac(983)

Question 702162: Can you please help me solve this linear equation using substitution
-3x+6y = 9
5x-2y = -7
Thank you.
Click here to see answer by MathLover1(20850)

Question 702243: Please help me solve this linear equation using substitution
0.6x - 0.2y = -0.2
-0.03x - 0.07y = 0.17
Thank you.
Click here to see answer by DrBeeee(684)

Question 702226: y =3x+5
4x+2y=20
Click here to see answer by jim_thompson5910(35256)

Question 702205: Please help me solve this system of equations by graphing : y=4x+3 y=-x-2
Click here to see answer by neatmath(302)

Question 702244: Please help me solve this linear equation using substitution.
0.6x - 0.2y = -0.2
-0.03x - 0.07y = 0.17
Thank you.
Click here to see answer by josgarithmetic(39617)

Question 702351: -7x+y=-19
-2x+3y=-19
-7x-8y=9
-4x+9y=-22
5x+4y=-30
3x-9y=-18
-14=-20y-7x
10y+4=2x
3+2x-y=0
-3-7y=10x
Solve by elimination
Click here to see answer by solver91311(24713)

Question 702370: 7x=4x-15
Click here to see answer by jim_thompson5910(35256)

Question 702372: what is the formula for finding the answer to 16 to the 9th power/16 to the 4th power
Click here to see answer by solver91311(24713)

Question 702443: y= -x/2-4
-2x-y=-5
Click here to see answer by jim_thompson5910(35256)

Question 702613: WITHOUT graphing, tell whether each point is on the graph of the line given
12x+3y=6; (2,-4)
Please Show Steps, THANK YOU!!
Click here to see answer by nerdybill(7384)

Question 702602: How do you find to value for slope on a perpendicular or parallel line
Click here to see answer by Edwin McCravy(20055)

Question 702757: The length of Vicki's garden is 4 meters greater than 3 times the width. The perimeter of her garden is 72 meters. What are the dimensions of vickis garden
Click here to see answer by ReadingBoosters(3246)

Question 702924: In the Algebra 1 notetaking guide, their are 2 equations, 5x + 4y = -12 and 3x - 4y+ -20. they ask us to graph and identify the connecting points, where the 2 lines intersect. I worked out the problem I just don't know how to graph it. So can you graph the two equations?
Click here to see answer by checkley79(3341)

Question 703023: how do you solve this linear system by using substitution?
0.5x+y=9
1.6x+0.2y=13

Click here to see answer by stanbon(75887)

Question 702498: how do you graph x = 0 and it's a slanted line. i did this before but i forgot. can you tell me the equation and explain each step? thx
Click here to see answer by KMST(5328)

Question 703134: how do you convert a point slope for example y+3=2/5(x+10) into standard form
Click here to see answer by stanbon(75887)

Question 703187: How do I solve:

FInd a real number, k, such that the line -7x+ky-16=0 has y intercept 13
Click here to see answer by lwsshak3(11628)

Question 703245: I am having a hard time figuring out whether to add or subtract this system of equations (must solve by elimination).
5x+3y=8
2x-4y=-6
I multiplied the first equation by 4 and the second by 3 and I ended up with 20x+12y=32
6x-12y=-18
26x=14
11x=7
x=7/11 I don't think this is right and I can't solve for y. Any help would be greatly appreciated.
Thanks
Click here to see answer by stanbon(75887)

Question 703228: Solve the system of linear equations below.
x + y = 4
2x + 3y = 0
Click here to see answer by checkley79(3341)

Question 703274: In the following system of equations, what does x equal?
10x + 9y = 3
8x + y = 6
Click here to see answer by Stitch(470)

Question 703385: 7x+2y=31
x-y=-2
Click here to see answer by checkley79(3341)

Question 703512: -5x -2y =10
y =(4x-11)
Click here to see answer by mananth(16946)

Question 703124: How do you use the Systems of Linear Equation but with the Elimination Method? Please explain with the question, x-10y=60 , x+-14y=12. Thankyou!
Click here to see answer by ankor@dixie-net.com(22740)

Question 703600: How do I set up the equation for "A bank teller cashed a check for $1010 using $20 bills and $50 bills. The teller handed 26 more $20 bills than $50 bills to the customer. Determine how many of each denomination were handed to the customer."?
Click here to see answer by nerdybill(7384)

Question 703623: solve by elimination -3x+4y=12 and 2x+y=-8
Click here to see answer by lynnlo(4176)

Question 703888: Solve the system using the substitution method. Show all your steps.
1. x+2y=6
3x-2y=2
3. 4x+y=7
2x+5y=-1
5. 3x+2y=-2
6x-y=6
Solve the system using the elimination method. Show all your steps.
7. -3x+3y=3
3x+y=9
9. -5x+12y=20
x-2y=-6
11. 3x+2y=1
4x+ 6y= 7
Solve the system using any algebraic method. Show all your steps.
13. 5x+ 7y= -2
2x-7y=9
14. x+3y=1
3x+7y=1
15. 4x+6y=8
2x+3y= 3
16. 8x-5y= -17
-2x+y=6
17. 3x-8y=0
-2x+5y=-2
18. 4x-6y=2
5x+3y= 1
19. 2x-5y=3
-4x+10y= -6
20. 8x+3y=10
-6x + y = -12
21. 5x+ 4y= -18
2x+3y=-24
22. CDs and Cassettes From 1990 to 1998, the manufacturer's shipments for audio cassettes A(in millions) and compact discs C(in millions) can be modeled by the equations
A= -31.8t + 322 Audio cassette shipments
C= 42.8t+110 Compact disc shipments
where t is the number of years since 1990. During what year did the number of compact discs shipped surpass the number of audio cassettes shipped?
Solve the system using any algebraic method. Show your steps.
30. 3x+7y= -1
2x +3y= 6
32. 3x-y= -2
5x+2y= 15
34. 2x + 3y= -6
3x- 4y= 25
36. 4x- 3y= 8
-8x +6y= 16
38. 7x+5y= -12
3x-4y=1

Solve the system. Then classify the system as consistent and independent, consistent and dependent, or inconsistent.
4, 4x+ 8y=8
x+ 2y=6
5. -5x+3y= -5
y= 5/3x + 1
6. x-2y=2
2x-y= -5
Solve the system using the substitution method. Show all steps.
7. 3x-y= -4
x+ 3y= -28
8. x+ 5y=1
-3x +4y= 16
9. 6x +y= -6
4x+3y= 17
Solve the system using the elmination method. Show all steps.
10. 2x- 3y= -1
2x+3y= -19
11. 3x-2y= 10
-6x +4y= -20
12. 2x +3y= 17
5x+8y= 20

Click here to see answer by checkley79(3341)

Question 704113: x+y=6,3x-4y=4

Click here to see answer by lynnlo(4176)

Question 704185: Point A (-4,1) is in the standard (x,y) coordinate plane. What must be the coordinates of point B so that the line x = 2 is the perpendicular bisector of line AB ?
Click here to see answer by DrBeeee(684)

Question 704186: Kevin operates a soybean farm. He buys many supplies in the bulk. Often the bulk products need to be custom mixed before Kevin can use them. Jo apply herbicide to a large field he must mix a solution of 67% herbicide with a solution of 46% herbicide to form 42 liters of a 55% solution. How much of the 67% solution must he use? Write a system of equations to find how much of the 67% solution must he use. Identify the variables, write the equation, solve the system by using Elimination or Substitution methods.
Click here to see answer by josgarithmetic(39617)

Question 704269: Video Store A charges $15 for membership and $2 for each video that is rented. Video store B does not charge a membership fee but charges $3.50 for each video that is rented. Write and graph a system of equations to determine the number of video rentals for which the cost, including membership fees, is the same for the two clubs. Identify the variables, write the equations, solve the system and graph the system of equations. Solve the System using Elimination and Substitution methods. Write complete Answers. Show all your work step by step. Write a short explanation about which will be the best method to solve the problem.
Click here to see answer by josgarithmetic(39617)

Question 704548: 4/3(7-n)=12
Click here to see answer by jim_thompson5910(35256)

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