-2-(-1)+2-1=

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Solution for -2-(-1)+2-1= equation: 


Simplifying
-2 + -1(-1) + 2 + -1 = 0

Multiply -1 * -1
-2 + 1 + 2 + -1 = 0

Combine like terms: -2 + 1 = -1
-1 + 2 + -1 = 0

Combine like terms: -1 + 2 = 1
1 + -1 = 0

Combine like terms: 1 + -1 = 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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