7(1+3n)=91

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Solution for 7(1+3n)=91 equation: 



7(1+3n)=91

We move all terms to the left:

7(1+3n)-(91)=0

We add all the numbers together, and all the variables

7(3n+1)-91=0

We multiply parentheses

21n+7-91=0

We add all the numbers together, and all the variables

21n-84=0

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

21n=84

n=84/21

n=4

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