2(5+n)=31

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Solution for 2(5+n)=31 equation: 



2(5+n)=31

We move all terms to the left:

2(5+n)-(31)=0

We add all the numbers together, and all the variables

2(n+5)-31=0

We multiply parentheses

2n+10-31=0

We add all the numbers together, and all the variables

2n-21=0

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

2n=21

n=21/2

n=10+1/2

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