7(n+4=21)

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Solution for 7(n+4=21) equation: 



7(n+4=21)

We move all terms to the left:

7(n+4-(21))=0

We add all the numbers together, and all the variables

7(n-17)=0

We multiply parentheses

7n-119=0

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

7n=119

n=119/7

n=17

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