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6.9=f/2
We move all terms to the left:
6.9-(f/2)=0
We add all the numbers together, and all the variables
-(+f/2)+6.9=0
We get rid of parentheses
-f/2+6.9=0
We multiply all the terms by the denominator
-f+(6.9)*2=0
We add all the numbers together, and all the variables
-1f+13.8=0
We move all terms containing f to the left, all other terms to the right
-f=-13.8
f=-13.8/-1
f=13+0.8/1
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