Answer
x = 3
y = -2
Work Step by Step
6x + 3y = 12
9x + 6y = 15
to the first equation,divide by 3
2x + y = 4 minus 2x to both sides
2x + y - 2x = 4 - 2x
y = 4 - 2x substitude y to the second equation
9x + 6 ( 4 - 2x ) = 15
9x + 24 - 12x = 15
-3x + 24 = 15 minus 24 to both sides
-3x + 24 - 24 = 15 - 24
- 3x = -9 divide by -3
$\frac{-3}{-3}$ = $\frac{-9}{-3}$
x = 3 substitude x to y = 4 - 2x
y = 4 - $2\times3$
y = 4 - 6
y = -2
