X-2+12=90

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Solution for X-2+12=90 equation: 


Simplifying
X + -2 + 12 = 90

Reorder the terms:
-2 + 12 + X = 90

Combine like terms: -2 + 12 = 10
10 + X = 90

Solving
10 + X = 90

Solving for variable 'X'.

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

Add '-10' to each side of the equation.
10 + -10 + X = 90 + -10

Combine like terms: 10 + -10 = 0
0 + X = 90 + -10
X = 90 + -10

Combine like terms: 90 + -10 = 80
X = 80

Simplifying
X = 80

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