## Thinking Mathematically (6th Edition)

$\frac{(2x+y)}{(xy-2x)}$, x=-2, y=4 Step 1:Substitute x=−2 and y=4 for each x and y $\frac{2(-2)+4}{(-2)(4)-2(-2)}$ Step 2: Multiply 2(-2) = -4 , (-2)(4) = -8 and 2(-2) = -4 $\frac{-4+4}{(-8)+4}$ Step 3: Add and subtract from left to right. $\frac{0}{-4}$ = 0