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-8b+6=21/2
We move all terms to the left:
-8b+6-(21/2)=0
We add all the numbers together, and all the variables
-8b+6-(+21/2)=0
We get rid of parentheses
-8b+6-21/2=0
We multiply all the terms by the denominator
-8b*2-21+6*2=0
We add all the numbers together, and all the variables
-8b*2-9=0
Wy multiply elements
-16b-9=0
We move all terms containing b to the left, all other terms to the right
-16b=9
b=9/-16
b=-9/16
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