42=3(8-8b)-2(1-2b)

Solution for 42=3(8-8b)-2(1-2b) equation:

42=3(8-8b)-2(1-2b)

We move all terms to the left:

42-(3(8-8b)-2(1-2b))=0

We add all the numbers together, and all the variables

-(3(-8b+8)-2(-2b+1))+42=0


We calculate terms in parentheses: -(3(-8b+8)-2(-2b+1)), so:

3(-8b+8)-2(-2b+1)

We multiply parentheses

-24b+4b+24-2

We add all the numbers together, and all the variables

-20b+22

Back to the equation:

-(-20b+22)


We get rid of parentheses

20b-22+42=0

We add all the numbers together, and all the variables

20b+20=0

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

20b=-20

b=-20/20

b=-1