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22 December, 18:33

Sherrie receives 5 times as many phone calls as Carrie, and Carrie receives 5 less calls than Mary. If the total number of combined calls for them was 68 how many calls did Mary receive?

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  1. 22 December, 19:05
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    let g, r and l be the calls received,

    r=c-5 and g=5b=5 (c-5) = 5c-25

    So, g + r+l=7c-30=68,

    7c = 98. c = 14

    Mary received 14 calls.
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