Question

X - y = -1 ; 3x - 2y = 6

Answer 1

x = 8

y = 9

Explanation:

x - y = -1

Add y to both sides to get x by itself:

x = -1 + y

3(-1 + y) - 2y = 6

-3 + 3y - 2y = 6

-3 + y = 6

y = 9

x - 9 = -1

x = 8

Answer 2

Solve for the first variable in one of the equations, then substitute the result into the other equation.