Question

Decide whether you would use the graphing, substitution, or elimination method to solve the following system of equations. Explain, in complete sentences, why you chose that method.2x + 5y = -3
-15x - 5y = -10

Answer 1

I would use elimination because the first step is already done for you

Answer 2

First of all I would never ever choose graphing to find the solution to a set of linear equations.

Answer 3

I would use elimination. Since the first equation has 5y and the second equation has -5y elimination would be convenient. I could add the two equations and eliminate the y terms.

Answer 4

elimination sounds cool!

Answer 5

for the reason mertsj pointed out

Answer 6

I will simply substract 1 from 2... wait that is how elimination works ... isn't ? ;)

Answer 7

just add the equations sweety

Answer 8

lol yeah, subtraction is adding though :P

Answer 9

that means you are doing this -5y-5y
we are trying to do this -5y+5y

Answer 10

Yes yes, I can always multiply either of them by -1 first :P :D

Answer 11

but you didn't say that so you fail muhahaha

Answer 12

lol, I left it for you to mention ...

Answer 13

2x + 5y = -3
-15x - 5y = -10
----------------
-13x+0=-13
-13x=-13
x=1

Answer 14

Do you know how to find y?

Answer 15

given x

Answer 16

Now I know that you can add too :P

Answer 17

I'm sometimes good at adding.