2n+5=21.

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Solution for 2n+5=21. equation: 



2n+5=21.

We move all terms to the left:

2n+5-(21.)=0

We add all the numbers together, and all the variables

2n+5-21=0

We add all the numbers together, and all the variables

2n-16=0

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

2n=16

n=16/2

n=8

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