30=5b+8b

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Solution for 30=5b+8b equation: 



30=5b+8b

We move all terms to the left:

30-(5b+8b)=0

We add all the numbers together, and all the variables

-(+13b)+30=0

We get rid of parentheses

-13b+30=0

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

-13b=-30

b=-30/-13

b=2+4/13

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