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-2.3f=-9.2
We move all terms to the left:
-2.3f-(-9.2)=0
We add all the numbers together, and all the variables
-2.3f+9.2=0
We move all terms containing f to the left, all other terms to the right
-2.3f=-9.2
f=-9.2/-2.3
f=+4
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