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(7.5)=10B+25
We move all terms to the left:
(7.5)-(10B+25)=0
We add all the numbers together, and all the variables
-(10B+25)+7.5=0
We get rid of parentheses
-10B-25+7.5=0
We add all the numbers together, and all the variables
-10B-17.5=0
We move all terms containing B to the left, all other terms to the right
-10B=17.5
B=17.5/-10
B=-1+5/6.6666666666667
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