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8b-7=-12+3
We move all terms to the left:
8b-7-(-12+3)=0
We add all the numbers together, and all the variables
8b-7-(-9)=0
We add all the numbers together, and all the variables
8b+2=0
We move all terms containing b to the left, all other terms to the right
8b=-2
b=-2/8
b=-1/4
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