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3b(-4)=-3
We move all terms to the left:
3b(-4)-(-3)=0
We add all the numbers together, and all the variables
3b(-4)+3=0
We multiply parentheses
-12b+3=0
We move all terms containing b to the left, all other terms to the right
-12b=-3
b=-3/-12
b=1/4
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