240=3(45+b)

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Solution for 240=3(45+b) equation: 



240=3(45+b)

We move all terms to the left:

240-(3(45+b))=0

We add all the numbers together, and all the variables

-(3(b+45))+240=0



We calculate terms in parentheses: -(3(b+45)), so:

3(b+45)

We multiply parentheses

3b+135

Back to the equation:

-(3b+135)



We get rid of parentheses

-3b-135+240=0

We add all the numbers together, and all the variables

-3b+105=0

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

-3b=-105

b=-105/-3

b=+35

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