-7+9u=5+7u

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Solution for -7+9u=5+7u equation: 



-7+9u=5+7u

We move all terms to the left:

-7+9u-(5+7u)=0

We add all the numbers together, and all the variables

9u-(7u+5)-7=0

We get rid of parentheses

9u-7u-5-7=0

We add all the numbers together, and all the variables

2u-12=0

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

2u=12

u=12/2

u=6

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