u-9=-7u=7

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Solution for u-9=-7u=7 equation: 



u-9=-7u=7

We move all terms to the left:

u-9-(-7u)=0

We get rid of parentheses

u+7u-9=0

We add all the numbers together, and all the variables

8u-9=0

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

8u=9

u=9/8

u=1+1/8

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