2(n+20)=21

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Solution for 2(n+20)=21 equation: 



2(n+20)=21

We move all terms to the left:

2(n+20)-(21)=0

We multiply parentheses

2n+40-21=0

We add all the numbers together, and all the variables

2n+19=0

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

2n=-19

n=-19/2

n=-9+1/2

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