## Algebra 1: Common Core (15th Edition)

a) $x=2$ b) $y=-2$
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 $y$: $y=-2$