-4(b-20)=12

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Solution for -4(b-20)=12 equation: 



-4(b-20)=12

We move all terms to the left:

-4(b-20)-(12)=0

We multiply parentheses

-4b+80-12=0

We add all the numbers together, and all the variables

-4b+68=0

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

-4b=-68

b=-68/-4

b=+17

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