x+7-x=-5

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Solution for x+7-x=-5 equation: 


Simplifying
x + 7 + -1x = -5

Reorder the terms:
7 + x + -1x = -5

Combine like terms: x + -1x = 0
7 + 0 = -5
7 = -5

Solving
7 = -5

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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