-2u=-2u

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Solution for -2u=-2u equation: 


Simplifying
-2u = -2u

Add '2u' to each side of the equation.
-2u + 2u = -2u + 2u

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

Combine like terms: -2u + 2u = 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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