[x-3]*2=30

Solution for [x-3]*2=30 equation:

Simplifying
[x + -3] * 2 = 30

Reorder the terms:
[-3 + x] * 2 = 30

Reorder the terms for easier multiplication:
2[-3 + x] = 30
[-3 * 2 + x * 2] = 30
[-6 + 2x] = 30

Solving
-6 + 2x = 30

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 + 2x = 30 + 6

Combine like terms: -6 + 6 = 0
0 + 2x = 30 + 6
2x = 30 + 6

Combine like terms: 30 + 6 = 36
2x = 36

Divide each side by '2'.
x = 18

Simplifying
x = 18