-7+-2y+2y=-7

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Solution for -7+-2y+2y=-7 equation: 


Simplifying
-7 + -2y + 2y = -7

Combine like terms: -2y + 2y = 0
-7 + 0 = -7
-7 = -7

Add '7' to each side of the equation.
-7 + 7 = -7 + 7

Combine like terms: -7 + 7 = 0
0 = -7 + 7

Combine like terms: -7 + 7 = 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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