80+X-8=90

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Solution for 80+X-8=90 equation: 


Simplifying
80 + X + -8 = 90

Reorder the terms:
80 + -8 + X = 90

Combine like terms: 80 + -8 = 72
72 + X = 90

Solving
72 + X = 90

Solving for variable 'X'.

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

Add '-72' to each side of the equation.
72 + -72 + X = 90 + -72

Combine like terms: 72 + -72 = 0
0 + X = 90 + -72
X = 90 + -72

Combine like terms: 90 + -72 = 18
X = 18

Simplifying
X = 18

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