X-9=84

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Solution for X-9=84 equation: 


Simplifying
X + -9 = 84

Reorder the terms:
-9 + X = 84

Solving
-9 + X = 84

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 = 84 + 9

Combine like terms: -9 + 9 = 0
0 + X = 84 + 9
X = 84 + 9

Combine like terms: 84 + 9 = 93
X = 93

Simplifying
X = 93

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