4+5=6+7

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Solution for 4+5=6+7 equation: 


Simplifying
4 + 5 = 6 + 7

Combine like terms: 4 + 5 = 9
9 = 6 + 7

Combine like terms: 6 + 7 = 13
9 = 13

Solving
9 = 13

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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