b-3b=4

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Solution for b-3b=4 equation: 



b-3b=4

We move all terms to the left:

b-3b-(4)=0

We add all the numbers together, and all the variables

-2b-4=0

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

-2b=4

b=4/-2

b=-2

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