7b+4=20-b

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Solution for 7b+4=20-b equation: 



7b+4=20-b

We move all terms to the left:

7b+4-(20-b)=0

We add all the numbers together, and all the variables

7b-(-1b+20)+4=0

We get rid of parentheses

7b+1b-20+4=0

We add all the numbers together, and all the variables

8b-16=0

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

8b=16

b=16/8

b=2

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