91+x=90

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Solution for 91+x=90 equation: 


Simplifying
91 + x = 90

Solving
91 + x = 90

Solving for variable 'x'.

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

Add '-91' to each side of the equation.
91 + -91 + x = 90 + -91

Combine like terms: 91 + -91 = 0
0 + x = 90 + -91
x = 90 + -91

Combine like terms: 90 + -91 = -1
x = -1

Simplifying
x = -1

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