2n+(7n+3)=7

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Solution for 2n+(7n+3)=7 equation: 



2n+(7n+3)=7

We move all terms to the left:

2n+(7n+3)-(7)=0

We get rid of parentheses

2n+7n+3-7=0

We add all the numbers together, and all the variables

9n-4=0

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

9n=4

n=4/9

n=4/9

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