7u+6(u+3)=31

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Solution for 7u+6(u+3)=31 equation: 



7u+6(u+3)=31

We move all terms to the left:

7u+6(u+3)-(31)=0

We multiply parentheses

7u+6u+18-31=0

We add all the numbers together, and all the variables

13u-13=0

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

13u=13

u=13/13

u=1

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