3-1=7+2

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Solution for 3-1=7+2 equation: 


Simplifying
3 + -1 = 7 + 2

Combine like terms: 3 + -1 = 2
2 = 7 + 2

Combine like terms: 7 + 2 = 9
2 = 9

Solving
2 = 9

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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