X-9=2x-21

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Solution for X-9=2x-21 equation: 


Simplifying
X + -9 = 2x + -21

Reorder the terms:
-9 + X = 2x + -21

Reorder the terms:
-9 + X = -21 + 2x

Solving
-9 + X = -21 + 2x

Solving for variable 'X'.

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

Add '9' to each side of the equation.
-9 + 9 + X = -21 + 9 + 2x

Combine like terms: -9 + 9 = 0
0 + X = -21 + 9 + 2x
X = -21 + 9 + 2x

Combine like terms: -21 + 9 = -12
X = -12 + 2x

Simplifying
X = -12 + 2x

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