Answer
a) $x=2$
b) $y=-2$
Work Step by Step
a) $5x - 6y =-32$
$3x + 6y =48$
Since the sum of the coefficients of y is 0, add the equations to eliminate y.
$8x = 16$
Solve for x: $x=2$
b) $-3x - 3y =9$
$3x - 4y =5$
Since the sum of the coefficients of $x$ is 0, add the equations to eliminate $x$.
$-7y = 14$
Solve for $y$: $y=-2$
