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1 September, 06:45

Over the last three evenings, Kala received a total of 131 phone calls at the call center. The third evening, she received 4 times as many calls as the first evening. The second evening, she received 5 more calls than the first evening. How many phone calls did she receive each evening?

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Answers (2)
  1. 1 September, 07:28
    0
    The no. of call received on the first evening = 21

    The no. of call received on the second evening = 26

    The no. of call received on the third evening = 84

    Step-by-step explanation:

    Let the no. of call received on the first evening be x.

    The no. of call received on the second evening = x + 5

    The no. of call received on the third evening = 4x

    x + x+5 + 4x = 131

    6x + 5 = 131

    6x = 131 - 5

    6x = 126

    x = 126/6

    x = 21

    The no. of call received on the first evening = 21

    The no. of call received on the second evening = 21 + 5 = 26

    The no. of call received on the third evening = 4*21 = 84
  2. 1 September, 10:02
    0
    First evening, 21 calls. Second evening, 26 calls. Third evening, 84 calls.

    Steps:

    T = 4F

    S = F + 5

    131 = F + S + T

    Substitute in the S and T equations;

    131 = F + F + 5 + 4F

    126 = 6F

    F = 21

    Then substitute F into both T and S equations;

    T = 4 * 21

    T = 84

    S = 21 + 5

    S = 26
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