9u=8+7u

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Solution for 9u=8+7u equation: 



9u=8+7u

We move all terms to the left:

9u-(8+7u)=0

We add all the numbers together, and all the variables

9u-(7u+8)=0

We get rid of parentheses

9u-7u-8=0

We add all the numbers together, and all the variables

2u-8=0

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

2u=8

u=8/2

u=4

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