91=13-n

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Solution for 91=13-n equation:


Simplifying
91 = 13 + -1n

Solving
91 = 13 + -1n

Solving for variable 'n'.

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

Add 'n' to each side of the equation.
91 + n = 13 + -1n + n

Combine like terms: -1n + n = 0
91 + n = 13 + 0
91 + n = 13

Add '-91' to each side of the equation.
91 + -91 + n = 13 + -91

Combine like terms: 91 + -91 = 0
0 + n = 13 + -91
n = 13 + -91

Combine like terms: 13 + -91 = -78
n = -78

Simplifying
n = -78

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