-4(8-7b)=-172

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Solution for -4(8-7b)=-172 equation: 



-4(8-7b)=-172

We move all terms to the left:

-4(8-7b)-(-172)=0

We add all the numbers together, and all the variables

-4(-7b+8)-(-172)=0

We add all the numbers together, and all the variables

-4(-7b+8)+172=0

We multiply parentheses

28b-32+172=0

We add all the numbers together, and all the variables

28b+140=0

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

28b=-140

b=-140/28

b=-5

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