-9u-4u=-78

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Solution for -9u-4u=-78 equation: 



-9u-4u=-78

We move all terms to the left:

-9u-4u-(-78)=0

We add all the numbers together, and all the variables

-13u+78=0

We move all terms containing u to the left, all other terms to the right

-13u=-78

u=-78/-13

u=+6

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