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40.9=b/4
We move all terms to the left:
40.9-(b/4)=0
We add all the numbers together, and all the variables
-(+b/4)+40.9=0
We get rid of parentheses
-b/4+40.9=0
We multiply all the terms by the denominator
-b+(40.9)*4=0
We add all the numbers together, and all the variables
-1b+163.6=0
We move all terms containing b to the left, all other terms to the right
-b=-163.6
b=-163.6/-1
b=163+0.59999999999999/1
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