X+87=99

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Solution for X+87=99 equation: 


Simplifying
X + 87 = 99

Reorder the terms:
87 + X = 99

Solving
87 + X = 99

Solving for variable 'X'.

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

Add '-87' to each side of the equation.
87 + -87 + X = 99 + -87

Combine like terms: 87 + -87 = 0
0 + X = 99 + -87
X = 99 + -87

Combine like terms: 99 + -87 = 12
X = 12

Simplifying
X = 12

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