X-2x=21

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Solution for X-2x=21 equation: 


Simplifying
X + -2x = 21

Solving
X + -2x = 21

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 + 2x = 21 + 2x

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

Simplifying
X = 21 + 2x

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