1-2-1+2=

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


Simplifying
1 + -2 + -1 + 2 = 0

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

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

Combine like terms: -2 + 2 = 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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