1-2=7

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Solution for 1-2=7 equation: 


Simplifying
1 + -2 = 7

Combine like terms: 1 + -2 = -1
-1 = 7

Solving
-1 = 7

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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