2(v+3)+5=21

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



2(v+3)+5=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

2(v+3)-16=0

We multiply parentheses

2v+6-16=0

We add all the numbers together, and all the variables

2v-10=0

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

2v=10

v=10/2

v=5

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