7(9+b)=84

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Solution for 7(9+b)=84 equation: 



7(9+b)=84

We move all terms to the left:

7(9+b)-(84)=0

We add all the numbers together, and all the variables

7(b+9)-84=0

We multiply parentheses

7b+63-84=0

We add all the numbers together, and all the variables

7b-21=0

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

7b=21

b=21/7

b=3

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