7u=8+9u

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Solution for 7u=8+9u equation: 



7u=8+9u

We move all terms to the left:

7u-(8+9u)=0

We add all the numbers together, and all the variables

7u-(9u+8)=0

We get rid of parentheses

7u-9u-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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