7b=4(b+30)=b

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Solution for 7b=4(b+30)=b equation: 



7b=4(b+30)=b

We move all terms to the left:

7b-(4(b+30))=0



We calculate terms in parentheses: -(4(b+30)), so:

4(b+30)

We multiply parentheses

4b+120

Back to the equation:

-(4b+120)



We get rid of parentheses

7b-4b-120=0

We add all the numbers together, and all the variables

3b-120=0

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

3b=120

b=120/3

b=40

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