7.8-(-13.2)=

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Solution for 7.8-(-13.2)= equation: 


Simplifying
7.8 + -1(-13.2) = 0

Multiply -1 * -13.2
7.8 + 13.2 = 0

Combine like terms: 7.8 + 13.2 = 21
21 = 0

Solving
21 = 0

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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