8-7u=-55

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Solution for 8-7u=-55 equation: 



8-7u=-55

We move all terms to the left:

8-7u-(-55)=0

We add all the numbers together, and all the variables

-7u+63=0

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

-7u=-63

u=-63/-7

u=+9

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