x=2x-21

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Solution for x=2x-21 equation: 


Simplifying
x = 2x + -21

Reorder the terms:
x = -21 + 2x

Solving
x = -21 + 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.
x + -2x = -21 + 2x + -2x

Combine like terms: x + -2x = -1x
-1x = -21 + 2x + -2x

Combine like terms: 2x + -2x = 0
-1x = -21 + 0
-1x = -21

Divide each side by '-1'.
x = 21

Simplifying
x = 21

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