12b-(5+2b)=-7

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Solution for 12b-(5+2b)=-7 equation: 



12b-(5+2b)=-7

We move all terms to the left:

12b-(5+2b)-(-7)=0

We add all the numbers together, and all the variables

12b-(2b+5)-(-7)=0

We add all the numbers together, and all the variables

12b-(2b+5)+7=0

We get rid of parentheses

12b-2b-5+7=0

We add all the numbers together, and all the variables

10b+2=0

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

10b=-2

b=-2/10

b=-1/5

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