3b-4=b-12

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Solution for 3b-4=b-12 equation: 



3b-4=b-12

We move all terms to the left:

3b-4-(b-12)=0

We get rid of parentheses

3b-b+12-4=0

We add all the numbers together, and all the variables

2b+8=0

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

2b=-8

b=-8/2

b=-4

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