-4;-4(3-b)=21

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Solution for -4;-4(3-b)=21 equation: 



-4-4(3-b)=21

We move all terms to the left:

-4-4(3-b)-(21)=0

We add all the numbers together, and all the variables

-4(-1b+3)-4-21=0

We add all the numbers together, and all the variables

-4(-1b+3)-25=0

We multiply parentheses

4b-12-25=0

We add all the numbers together, and all the variables

4b-37=0

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

4b=37

b=37/4

b=9+1/4

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