SOLUTION: I need help quick. I need to see these two problems worked out in both the SUBSTITUTION and the ELIMINATION methods. 2x-3y=-1, 3x-4y=5 then 2x+3y=5, 9y=15-6x HELP

Question 134761:
I need help quick. I need to see these two problems worked out in both the SUBSTITUTION and the ELIMINATION methods.
2x-3y=-1, 3x-4y=5 then 2x+3y=5, 9y=15-6x HELP
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
2x-3y=-1 multiply this equation by -3.
3x-4y=5 multiply this equation by 2 & add them that will eliminate the x term.
-6x+9y=3
6x-8y=10
------------------------
y=13 answer.
2x-3*13=-1
2x-39=-1
2x=-1+39
2x=38
x=38/2
x=19 answer.
--------------------------------------------------------------------
2x+3y=5
2x=5-3y
x=(5-3y)/2
9y=15-6(5-3y)/2
9y=15-(30-18y)/2
9y=(2*15-30+18y)/2
18y=30-30+18y
18y-18y=0
0=0 thus these 2 equations are the same.

RELATED QUESTIONS
i need to solve these two systems of equations: 3x+4y=12 and 2x+y=13 we have to solve... (answered by stanbon)

I need to see this worked out in the ELIMINATION METHOD quickly. 2x-3y=1-... (answered by stanbon)

I need to know how to use both elimination and substitution methods on the linear... (answered by Boreal,ikleyn)

I need to see the solution worked out in steps. Thank you... (answered by jim_thompson5910)

These 3 problems are causing me stress as I can barely understand the elimination and... (answered by Theo)

I am having trouble completing this word problems for my assignment. I have to use two... (answered by jorel1380)

When solving Linear Systems algebraically, there are the three main methods;... (answered by alaccalac)

can you help me solve this equation? I am trying to solve a system of linear... (answered by xcentaur)

Solve the system by the elimination method. I need to see it worked out. Answer I'm... (answered by richwmiller)