87=3-7n

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Solution for 87=3-7n equation: 



87=3-7n

We move all terms to the left:

87-(3-7n)=0

We add all the numbers together, and all the variables

-(-7n+3)+87=0

We get rid of parentheses

7n-3+87=0

We add all the numbers together, and all the variables

7n+84=0

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

7n=-84

n=-84/7

n=-12

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