X-81=9

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Solution for X-81=9 equation: 


Simplifying
X + -81 = 9

Reorder the terms:
-81 + X = 9

Solving
-81 + X = 9

Solving for variable 'X'.

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

Add '81' to each side of the equation.
-81 + 81 + X = 9 + 81

Combine like terms: -81 + 81 = 0
0 + X = 9 + 81
X = 9 + 81

Combine like terms: 9 + 81 = 90
X = 90

Simplifying
X = 90

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