Answer:
x = 0
Step-by-step explanation:
Multiply the first equation by -3 and add the second equation.
-3(-x +2y) +(6y) = -3(6) +(x +18)
3x -6y +6y = -18 +x +18 . . . . eliminate parentheses
3x = x . . . . . . . . .simplify
2x = 0 . . . . . . . . subtract x
x = 0 . . . . . . . . . .divide by 2
