-91=9(-10)-1

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Solution for -91=9(-10)-1 equation: 


Simplifying
-91 = 9(-10) + -1

Multiply 9 * -10
-91 = -90 + -1

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

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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