87+91+81+n=90

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Solution for 87+91+81+n=90 equation: 


Simplifying
87 + 91 + 81 + n = 90

Combine like terms: 87 + 91 = 178
178 + 81 + n = 90

Combine like terms: 178 + 81 = 259
259 + n = 90

Solving
259 + n = 90

Solving for variable 'n'.

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

Add '-259' to each side of the equation.
259 + -259 + n = 90 + -259

Combine like terms: 259 + -259 = 0
0 + n = 90 + -259
n = 90 + -259

Combine like terms: 90 + -259 = -169
n = -169

Simplifying
n = -169

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