2(x-3)-15=21

Solution for 2(x-3)-15=21 equation:

Simplifying
2(x + -3) + -15 = 21

Reorder the terms:
2(-3 + x) + -15 = 21
(-3 * 2 + x * 2) + -15 = 21
(-6 + 2x) + -15 = 21

Reorder the terms:
-6 + -15 + 2x = 21

Combine like terms: -6 + -15 = -21
-21 + 2x = 21

Solving
-21 + 2x = 21

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 2x = 21 + 21

Combine like terms: -21 + 21 = 0
0 + 2x = 21 + 21
2x = 21 + 21

Combine like terms: 21 + 21 = 42
2x = 42

Divide each side by '2'.
x = 21

Simplifying
x = 21