7b=4(40+30)

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Solution for 7b=4(40+30) equation: 



7b=4(40+30)

We move all terms to the left:

7b-(4(40+30))=0

We add all the numbers together, and all the variables

7b-(470)=0

We add all the numbers together, and all the variables

7b-470=0

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

7b=470

b=470/7

b=67+1/7

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