87+x=100

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Solution for 87+x=100 equation: 


Simplifying
87 + x = 100

Solving
87 + x = 100

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 = 100 + -87

Combine like terms: 87 + -87 = 0
0 + x = 100 + -87
x = 100 + -87

Combine like terms: 100 + -87 = 13
x = 13

Simplifying
x = 13

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