3b+5=-b-7

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Solution for 3b+5=-b-7 equation: 



3b+5=-b-7

We move all terms to the left:

3b+5-(-b-7)=0

We add all the numbers together, and all the variables

3b-(-1b-7)+5=0

We get rid of parentheses

3b+1b+7+5=0

We add all the numbers together, and all the variables

4b+12=0

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

4b=-12

b=-12/4

b=-3

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