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30.5+8f=-8.5(2f+6.5)
We move all terms to the left:
30.5+8f-(-8.5(2f+6.5))=0
We calculate terms in parentheses: -(-8.5(2f+6.5)), so:We get rid of parentheses
-8.5(2f+6.5)
We multiply parentheses
-17f-55.25
Back to the equation:
-(-17f-55.25)
8f+17f+55.25+30.5=0
We add all the numbers together, and all the variables
25f+85.75=0
We move all terms containing f to the left, all other terms to the right
25f=-85.75
f=-85.75/25
f=-3+1.8695652173913/4.3478260869565
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