-10(1+3b)=-20

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Solution for -10(1+3b)=-20 equation: 



-10(1+3b)=-20

We move all terms to the left:

-10(1+3b)-(-20)=0

We add all the numbers together, and all the variables

-10(3b+1)-(-20)=0

We add all the numbers together, and all the variables

-10(3b+1)+20=0

We multiply parentheses

-30b-10+20=0

We add all the numbers together, and all the variables

-30b+10=0

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

-30b=-10

b=-10/-30

b=1/3

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