9u+7=u+39

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Solution for 9u+7=u+39 equation: 



9u+7=u+39

We move all terms to the left:

9u+7-(u+39)=0

We get rid of parentheses

9u-u-39+7=0

We add all the numbers together, and all the variables

8u-32=0

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

8u=32

u=32/8

u=4

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