X-12=78-x

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Solution for X-12=78-x equation: 


Simplifying
X + -12 = 78 + -1x

Reorder the terms:
-12 + X = 78 + -1x

Solving
-12 + X = 78 + -1x

Solving for variable 'X'.

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

Add '12' to each side of the equation.
-12 + 12 + X = 78 + 12 + -1x

Combine like terms: -12 + 12 = 0
0 + X = 78 + 12 + -1x
X = 78 + 12 + -1x

Combine like terms: 78 + 12 = 90
X = 90 + -1x

Simplifying
X = 90 + -1x

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