6-(-7)=9

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Solution for 6-(-7)=9 equation: 


Simplifying
6 + -1(-7) = 9

Multiply -1 * -7
6 + 7 = 9

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

Solving
13 = 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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