2n+21=4n+15=

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Solution for 2n+21=4n+15= equation: 



2n+21=4n+15=

We move all terms to the left:

2n+21-(4n+15)=0

We get rid of parentheses

2n-4n-15+21=0

We add all the numbers together, and all the variables

-2n+6=0

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

-2n=-6

n=-6/-2

n=+3

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