-9+(21-1)7=131

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Solution for -9+(21-1)7=131 equation: 


Simplifying
-9 + (21 + -1) * 7 = 131

Combine like terms: 21 + -1 = 20
-9 + (20) * 7 = 131

Multiply 20 * 7
-9 + 140 = 131

Combine like terms: -9 + 140 = 131
131 = 131

Add '-131' to each side of the equation.
131 + -131 = 131 + -131

Combine like terms: 131 + -131 = 0
0 = 131 + -131

Combine like terms: 131 + -131 = 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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