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12-b=12.5/5
We move all terms to the left:
12-b-(12.5/5)=0
We add all the numbers together, and all the variables
-b+12-(+12.5/5)=0
We add all the numbers together, and all the variables
-1b+12-(+12.5/5)=0
We get rid of parentheses
-1b+12-12.5/5=0
We multiply all the terms by the denominator
-1b*5-12.5+12*5=0
We add all the numbers together, and all the variables
-1b*5+47.5=0
Wy multiply elements
-5b+47.5=0
We move all terms containing b to the left, all other terms to the right
-5b=-47.5
b=-47.5/-5
b=9+2.5/5
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