Solve for x:
[ 3x + 12 ] / [ x + 4 ] = [4x^2 + 8x + 8x^2] / [ 2x] simplify and combine terms
3[ x + 4] / [ x + 4 ] = [ 12x^2 + 8x] . [2x]
3 = 4x [ 3x + 2 ] ] [2x]
3 = 2[3x + 2 ]
3 = 6x + 4 subtract 4 from both sides
-1 = 6x divide by 6 on both sides
-1/6 = x