8-u=-7

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Solution for 8-u=-7 equation: 



8-u=-7

We move all terms to the left:

8-u-(-7)=0

We add all the numbers together, and all the variables

-1u+15=0

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

-u=-15

u=-15/-1

u=+15

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