-40=4(3+b)

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Solution for -40=4(3+b) equation: 



-40=4(3+b)

We move all terms to the left:

-40-(4(3+b))=0

We add all the numbers together, and all the variables

-(4(b+3))-40=0



We calculate terms in parentheses: -(4(b+3)), so:

4(b+3)

We multiply parentheses

4b+12

Back to the equation:

-(4b+12)



We get rid of parentheses

-4b-12-40=0

We add all the numbers together, and all the variables

-4b-52=0

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

-4b=52

b=52/-4

b=-13

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