5u+4(u+3)=21

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Solution for 5u+4(u+3)=21 equation: 



5u+4(u+3)=21

We move all terms to the left:

5u+4(u+3)-(21)=0

We multiply parentheses

5u+4u+12-21=0

We add all the numbers together, and all the variables

9u-9=0

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

9u=9

u=9/9

u=1

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