3(u+1)=-3u-21

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Solution for 3(u+1)=-3u-21 equation: 



3(u+1)=-3u-21

We move all terms to the left:

3(u+1)-(-3u-21)=0

We multiply parentheses

3u-(-3u-21)+3=0

We get rid of parentheses

3u+3u+21+3=0

We add all the numbers together, and all the variables

6u+24=0

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

6u=-24

u=-24/6

u=-4

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