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0.30f+20=0.75f+10
We move all terms to the left:
0.30f+20-(0.75f+10)=0
We get rid of parentheses
0.30f-0.75f-10+20=0
We add all the numbers together, and all the variables
-0.45f+10=0
We move all terms containing f to the left, all other terms to the right
-0.45f=-10
f=-10/-0.45
f=22+0.1/0.45
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