Question

Here's another system of equations:


y = 2 - x

-5x - 15y = 60


Which method would you use to solve this system?

What is the solution to this system of equations?

Answer 1

I would use substitution. substitute "2 - x" in for y in the second equation and solve for x. then sub that into the first equation to get y.

Answer 2

check it like :

-5x -15(2-x))=60
-5x-30+15x=60
10x=90
x=9
y=2-9=-7

x=9
y=-7