-7(u+1)=7u+21

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Solution for -7(u+1)=7u+21 equation: 



-7(u+1)=7u+21

We move all terms to the left:

-7(u+1)-(7u+21)=0

We multiply parentheses

-7u-(7u+21)-7=0

We get rid of parentheses

-7u-7u-21-7=0

We add all the numbers together, and all the variables

-14u-28=0

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

-14u=28

u=28/-14

u=-2

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