9(1+b)=72

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Solution for 9(1+b)=72 equation: 



9(1+b)=72

We move all terms to the left:

9(1+b)-(72)=0

We add all the numbers together, and all the variables

9(b+1)-72=0

We multiply parentheses

9b+9-72=0

We add all the numbers together, and all the variables

9b-63=0

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

9b=63

b=63/9

b=7

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