40=2(b-15)

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Solution for 40=2(b-15) equation: 



40=2(b-15)

We move all terms to the left:

40-(2(b-15))=0



We calculate terms in parentheses: -(2(b-15)), so:

2(b-15)

We multiply parentheses

2b-30

Back to the equation:

-(2b-30)



We get rid of parentheses

-2b+30+40=0

We add all the numbers together, and all the variables

-2b+70=0

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

-2b=-70

b=-70/-2

b=+35

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