180-21=159

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Solution for 180-21=159 equation: 


Simplifying
180 + -21 = 159

Combine like terms: 180 + -21 = 159
159 = 159

Add '-159' to each side of the equation.
159 + -159 = 159 + -159

Combine like terms: 159 + -159 = 0
0 = 159 + -159

Combine like terms: 159 + -159 = 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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