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6.5f-4-5f=-29.5
We move all terms to the left:
6.5f-4-5f-(-29.5)=0
We add all the numbers together, and all the variables
1.5f+25.5=0
We move all terms containing f to the left, all other terms to the right
1.5f=-25.5
f=-25.5/1.5
f=-17
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