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22.2=5.4+2.1f
We move all terms to the left:
22.2-(5.4+2.1f)=0
We add all the numbers together, and all the variables
-(2.1f+5.4)+22.2=0
We get rid of parentheses
-2.1f-5.4+22.2=0
We add all the numbers together, and all the variables
-2.1f+16.8=0
We move all terms containing f to the left, all other terms to the right
-2.1f=-16.8
f=-16.8/-2.1
f=+8
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