Question

Use elimination to solve.
X-3y=10
X+2y=15

Answer 1

multiply the top by a negative

Answer 2

What negative?

Answer 3

Subtract second eq from first
-5y = -5 : y= 1 : substitute in either eq
x+2(1) = 15 : x =13
x-3(1) =13 : checks

Answer 4

x-3(1) =10 : checks

Answer 5

We're using elimination not substitution.

Answer 6

Yeah eliminatin

Answer 7

Use elimination first by subtract eq 2 from eq 1, then subtitution