Question

What is the solution to the system of equations?
x+y=5
x-2y=5

Answer 1

What method?

Answer 2

substitution method.

Answer 3

Cool, so what you want to do for this is isolate one of the variables (get x or y on its own) then substitute that into the second equation. Lets go from there for now, so can you do that please? Pick any variable and isolate it.

Answer 4

I started the top one. I had y=5-x

Answer 5

Very good, now what you want to do is take that y = 5-x and plug it as y in the second equation and you'll be left with just x to solve hence you can solve x.

So do you understand what I'm saying?

Answer 6

yeah.

Answer 7

Alright so what does it look like when you plug the y expression in the second equation?