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30 August, 05:28

Paul bought 9 total shirts for a total length f $72. Tee shirts cost $10 and long sleeve shirts cost $7. How many of each type shirt did he buy

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Answers (2)
  1. 30 August, 07:26
    0
    6 long sleves and 3 short
  2. 30 August, 08:55
    0
    X = tee shirts, y = long sleeved shirts

    x + y = 9 ... x = 9 - y

    10x + 7y = 72

    10 (9 - y) + 7y = 72

    90 - 10y + 7y = 72

    -10y + 7y = 72 - 90

    -3y = - 18

    y = - 18/-3

    y = 6 < = = = 6 long sleeved shirts

    x + y = 9

    x + 6 = 9

    x = 9 - 6

    x = 3 < = = 3 tee shirts
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