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.8b+12-b=8+7b+4
We move all terms to the left:
.8b+12-b-(8+7b+4)=0
We add all the numbers together, and all the variables
.8b-b-(7b+12)+12=0
We add all the numbers together, and all the variables
-0.2b-(7b+12)+12=0
We get rid of parentheses
-0.2b-7b-12+12=0
We add all the numbers together, and all the variables
-7.2b=0
b=0/-7.2
b=0
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