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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 564320: how do you do this equation by elimination?
y=3x+17
y=-2x-8

Click here to see answer by Alan3354(31529)

Question 564462: Please solve the following system of linear equations with substitution.
3x-2=y
y-2x=-5
Click here to see answer by ankor@dixie-net.com(15746)

Question 565025: I have no clue how to solve Systems of Equations!!!??? HELP EX: y=3x+6
y=x+2
Any Suggetions??
Click here to see answer by ankor@dixie-net.com(15746)

Question 565125: 2x - y = 10
4x - 2y = 7
I am supposed to use elimination, when i tried it several times i kept ending up with this:
-4x + 2y = -20
4x - 2y = 7
This would cancel both the 4x's and 2y's.
Click here to see answer by jim_thompson5910(28715)

Question 565159: I was asked to solve a system of equations, and I got the problem:
x=-4y
3x+2y=20
I substituted -4y for x and got -12y+2y=20 or 14y=20 and I don't know if I did the problem right so far, and if I did, how to finish solving.
Click here to see answer by jim_thompson5910(28715)

Question 565164: What is X= -Y
2Y-3x=25
Click here to see answer by mananth(12270)

Question 565304: Is (8, -1) a solution of the system, 2x + 3y = 13 and x - y = 9?
yes or no
Click here to see answer by mananth(12270)

Question 565310:
Graph the two equations to solve the system. What is the ordered pair solution?
x + y = 6 and x - y = 4

(4, 2)

(6, 2)

(5, 1)

no solution
Click here to see answer by mananth(12270)

Question 565308: Is (-2, -5) a solution of the system, 3x + 2y = 4 and 2x - 5y = -29?
yes or no ?
Click here to see answer by mananth(12270)

Question 565337: 5(4-x)+(7+x)=47
Click here to see answer by Tias_411(14)

Question 565302: I need help with a word problem, I have a way to find the solution but it is not the way we were instructed.Below, is a copy of the word problem.
You plant a 14 inch hemlock tree that grows at a rate of 4 inches per year.You also plant a 8 inch spruce that grows at a rate of 6 inches per year.In how many years will both trees be the same height, and how tall will they be.
I am not requesting the answer, I just need a linear system to solve.
The way I found how to solve but isn't the way instructed is:
14+4x=y
8+6x=y
I would have to do that equation over and over again to find the correct answer. My teacher would be displeased if I had not used the way instructed.I struggle with word problems and I am going to stay after school to get help.
Click here to see answer by ankor@dixie-net.com(15746)

Question 565396: is this linear 5=8-3y
Click here to see answer by stanbon(57967)

Question 565474: Can you solve the linear system by using the substitution method and showing details please. Thank you
3x+4y=-3
2x+y=8
Click here to see answer by scott8148(6628)

Question 565207: What is 3x + Y=5
Y=x-7? And how do you work it out
Click here to see answer by scott8148(6628)

Question 565518: -5X+25=-55
Click here to see answer by Leaf W.(97)

Question 565660: OK I have been stumped on this and skipped it but can you do it and see my answer matches because there is not a selection for mine. HERE IT IS---- (An algebra teacher drove by a farmyard full of chickens and pigs. The teacher happened to notice that there were a total of 100 heads and 270 legs. How many chickens were there? How many pigs were there?)
Click here to see answer by Alan3354(31529)

Question 565833: 2x+3y=26
1x+8y=14
Click here to see answer by mananth(12270)

Question 565834: 3x/4 = 27
the reason I am confused is because the fraction usually has the x right in the middle of 3/4 but this time the x is on the top section of the fraction next to the 3.

thanks for your help
Click here to see answer by ankor@dixie-net.com(15746)

Question 565863: 3x-10y=-25
4x+40y=-5
how do you solve these by elimination?
Click here to see answer by solver91311(17077)

Question 566125: May you help me solve this problem below...

What is the y-intercept of -6x - 1/3y = 6
i got -2 but im not sure if thats correct.
Click here to see answer by TutorDelphia(193)

Question 566128: May you help me with this problem please?

Which is the slope of the line with equation 5x + y = 15?
i solved it and got 5
Click here to see answer by TutorDelphia(193)

Question 566164: Please help me use the elemination method to solve these systems.
1. x-y=-2
x-3y= -12
a. ( -5,-3) b. ( 5,3) c. (-3,-5) d. ( 3,5)
Click here to see answer by Alan3354(31529)

Question 566189: Which number is one-fourth between 2.2 and 8.5?
I chose 3.775, I am correct?
Click here to see answer by Alan3354(31529)

Question 566188: Which number is one-fourth between 2.2 and 8.5?
I chose 3.775, I am correct?
Click here to see answer by Alan3354(31529)

Question 566195: How do i solve this?
solve the linear system using substitution
x=5y-42
x+5y=48
Click here to see answer by Alan3354(31529)

Question 566178: How would you graph x + 3 = 0
I thought it would be horizontal line across -3
Click here to see answer by Alan3354(31529)

Question 566238: trying to figure out the problem for the solution 3h +4t =12. I have no idea how to figure this out. the teacher said to make your best attempt but I don't even know where to begin.
Click here to see answer by richard1234(5390)

Question 566186: I tried to use every system to solve these problems... I have an "a" and a "b" in each problem

A: x+5y = -15
y = 1/5x + 1

[ I got (-8, -1.2)for my answer]

B: 2x - 3y = -27
-3x + 2y = 23
[ I got -3 for my answer]
Click here to see answer by solver91311(17077)

Question 566470: 2x+y=5
2x+y=1 substatution

Click here to see answer by mananth(12270)

Question 566688: https://takeexam.next.ecollege.com/ec/pub/K12Content/Courses/resources/swfs/media/Ninth_Grade/Math/Unit19184/Lesson73197/UT2B_stem.gif

What is the slope of the line? I solved this and got 5/2...

Click here to see answer by Alan3354(31529)

Question 566795: Solve system of equation by the substitution method.
{y = 2x + 9
{y = 7x + 10
Click here to see answer by solver91311(17077)

Question 566738: What are the coordinates of the vertex of the graph of f(x) = 2|x| + 4?

i chose (-2,4)
Click here to see answer by jim_thompson5910(28715)

Question 566807: Solve for y
y = 2(-1/5) + 9
Click here to see answer by jim_thompson5910(28715)

Question 567023: I'm having trouble with a math problem about systems of linear equations. FInd out the values of x and y and please show your work.
7x+3y=1
4x-y=6
I thank you for the help.
Click here to see answer by stanbon(57967)

Question 567039: Line L has equation y= -5x-15. Line m has equation y=x-3. Find the point of intersection. Can you also please show your work to get your answer.
Click here to see answer by mananth(12270)

Question 567119: Birdseed costs $0.59 a pound and sunflower seeds cost %0.89. Angela's pet store wishes to make a 40-pound mixture of birdseed and sunflower seeds that sells for $0.76 per pound. How many pounds of each type of seeds should she use?
Please help me solve this application problem for systems of linear equations!
Click here to see answer by josmiceli(9817)

Question 567190: Scenario: Gas Mileage of Cars
A BMW 128ci mile per gallon is 18. The Mercedes-Benz C300 mile per gallon is 19. It cost $20.83 for the BMW to travel 100 miles. It cost $19.73 for the Mercedes-Benz to travel 100 miles. The price for a gallon of gas is $3.75. How many gallons does it take to travel 100 miles for each vehicle?
Also, what are the equations?
(solve by elimination, and show your work)
Click here to see answer by stanbon(57967)

Question 567239: Answer graphically
2x+3y = 0
x+5y = 7
Click here to see answer by mananth(12270)

Question 567539: -294/19-2x=-10.5
Click here to see answer by unlockmath(1614)

Question 567547: Are the graphs of the lines in each pair parallel? Explain.
y = -3/2x + 2
3x + 2y = 8
Click here to see answer by lwsshak3(6761)

Question 567611: 7x+2y=-13
-3x-8y=-23 using the substitution method
Click here to see answer by stanbon(57967)

Question 567653: I need help with this (solving systems).
The Science Club needs to rent a bus for a field tripe. M.S. Buses charges a $40 rental fee, plus $2 per mile. C.B. Buses charges a $20 rental fee, plus $3 per mile. For what number of miles will the total be the same? What will the charge be?
How would I solve this problem? Thank you for the help.
Click here to see answer by ankor@dixie-net.com(15746)

Question 567872: T 10:15 P.M., a train left Petersburg, Virginia, travelling east at 40 mi/h. Two hours later, another train left the same station travelling west at 35 mi/h. At what time will the trains be 230 mi apart?
Click here to see answer by mananth(12270)

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