84=-3(3n-7)

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Solution for 84=-3(3n-7) equation:


84=-3(3n-7)

We simplify the equation to the form, which is simple to understand 
84=-3(3n-7)

Reorder the terms in parentheses
84=+(-9n+21)

Remove unnecessary parentheses
+84=-9n+21

We move all terms containing n to the left and all other terms to the right. 
+9n=+21-84

We simplify left and right side of the equation. 
+9n=-63

We divide both sides of the equation by 09 to get n. 
n=-7

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