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=30.75-0.07B
We move all terms to the left:
-(30.75-0.07B)=0
We add all the numbers together, and all the variables
-(-0.07B+30.75)=0
We get rid of parentheses
0.07B-30.75=0
We move all terms containing B to the left, all other terms to the right
0.07B=30.75
B=30.75/0.07
B=439+0.019999999999996/0.07
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