2(u+3)+5=21

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



2(u+3)+5=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

2(u+3)-16=0

We multiply parentheses

2u+6-16=0

We add all the numbers together, and all the variables

2u-10=0

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

2u=10

u=10/2

u=5

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