9(4+8b)=20

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Solution for 9(4+8b)=20 equation: 



9(4+8b)=20

We move all terms to the left:

9(4+8b)-(20)=0

We add all the numbers together, and all the variables

9(8b+4)-20=0

We multiply parentheses

72b+36-20=0

We add all the numbers together, and all the variables

72b+16=0

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

72b=-16

b=-16/72

b=-2/9

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