x+21-6=2x

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Solution for x+21-6=2x equation:


Simplifying
x + 21 + -6 = 2x

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

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

Solving
15 + x = 2x

Solving for variable 'x'.

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

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

Combine like terms: x + -2x = -1x
15 + -1x = 2x + -2x

Combine like terms: 2x + -2x = 0
15 + -1x = 0

Add '-15' to each side of the equation.
15 + -15 + -1x = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 0 + -15
-1x = 0 + -15

Combine like terms: 0 + -15 = -15
-1x = -15

Divide each side by '-1'.
x = 15

Simplifying
x = 15

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