7b-3b=-20

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Solution for 7b-3b=-20 equation: 



7b-3b=-20

We move all terms to the left:

7b-3b-(-20)=0

We add all the numbers together, and all the variables

4b+20=0

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

4b=-20

b=-20/4

b=-5

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