Solve the following equation for z: 15 = 10z/[2-(2x4)]?

I make it z = -9

15 = 10z/[2 - 8]
15 = 10z/-6
-90 = 10z
-9 = z

do them in BEDMAS order: the item in the innermost brackets first (2x4)
then the next brackets [2-(2x4)]
then Division and Multiplication: 10z/[2-(2x4)]
you will want to simplify by dividing both halves of the fraction by the same number to find z.

x=2