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560-1.9b=539.1
We move all terms to the left:
560-1.9b-(539.1)=0
We add all the numbers together, and all the variables
-1.9b+20.9=0
We move all terms containing b to the left, all other terms to the right
-1.9b=-20.9
b=-20.9/-1.9
b=+11
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