-5u+2(u+3)=21

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Solution for -5u+2(u+3)=21 equation: 



-5u+2(u+3)=21

We move all terms to the left:

-5u+2(u+3)-(21)=0

We multiply parentheses

-5u+2u+6-21=0

We add all the numbers together, and all the variables

-3u-15=0

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

-3u=15

u=15/-3

u=-5

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