3(x-1)2=15

Solution for 3(x-1)2=15 equation:

Simplifying
3(x + -1) * 2 = 15

Reorder the terms:
3(-1 + x) * 2 = 15

Reorder the terms for easier multiplication:
3 * 2(-1 + x) = 15

Multiply 3 * 2
6(-1 + x) = 15
(-1 * 6 + x * 6) = 15
(-6 + 6x) = 15

Solving
-6 + 6x = 15

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '6' to each side of the equation.
-6 + 6 + 6x = 15 + 6

Combine like terms: -6 + 6 = 0
0 + 6x = 15 + 6
6x = 15 + 6

Combine like terms: 15 + 6 = 21
6x = 21

Divide each side by '6'.
x = 3.5

Simplifying
x = 3.5