87+x=80

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Solution for 87+x=80 equation: 


Simplifying
87 + x = 80

Solving
87 + x = 80

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 = 80 + -87

Combine like terms: 87 + -87 = 0
0 + x = 80 + -87
x = 80 + -87

Combine like terms: 80 + -87 = -7
x = -7

Simplifying
x = -7

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