Math

Formula :
F(fine) = $0.25+0.05 d (days)

A book is fine is $1.30 . How may days book was due.
My work
1.30=0.25+0.05d
-0.25=0.05d
1.05= 0.05d
1.05/0.05=d
21=d



I get 21 days is this right?

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asked by Jay
  1. I agree with your answer but not your math steps. For example, step 2 is not right because -0.25 is not equal to 0.05d.
    1.30=0.25+0.05d
    1.30 - 0.25 = 0.05d
    1.05 = 0.05d
    1.05/0.05 = d
    21 = d

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