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4.3-7.2f=-10.3
We move all terms to the left:
4.3-7.2f-(-10.3)=0
We add all the numbers together, and all the variables
-7.2f+14.6=0
We move all terms containing f to the left, all other terms to the right
-7.2f=-14.6
f=-14.6/-7.2
f=2+0.2/7.2
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