2(x+3(x-1))=18

Solution for 2(x+3(x-1))=18 equation:

Simplifying
2(x + 3(x + -1)) = 18

Reorder the terms:
2(x + 3(-1 + x)) = 18
2(x + (-1 * 3 + x * 3)) = 18
2(x + (-3 + 3x)) = 18

Reorder the terms:
2(-3 + x + 3x) = 18

Combine like terms: x + 3x = 4x
2(-3 + 4x) = 18
(-3 * 2 + 4x * 2) = 18
(-6 + 8x) = 18

Solving
-6 + 8x = 18

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 + 8x = 18 + 6

Combine like terms: -6 + 6 = 0
0 + 8x = 18 + 6
8x = 18 + 6

Combine like terms: 18 + 6 = 24
8x = 24

Divide each side by '8'.
x = 3

Simplifying
x = 3