-1=3+4

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Solution for -1=3+4 equation: 


Simplifying
-1 = 3 + 4

Combine like terms: 3 + 4 = 7
-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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