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30 November, 18:29

Ahmed is taking orders for lunch. A slice of pizza cost $2 and a chicken sandwich costs $3. He collects $24 for the group of 10 people. How many people ordered a chicken sandwich?

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  1. 30 November, 19:52
    0
    1.5x+2.5y=21.50

    x+y=9

    8 people ordered chicken sandwich
  2. 30 November, 21:00
    0
    2p+3c=24

    p+c=10

    solve for p: p = 10-c

    Substitute for p: 20-2c+3c=24

    add the Cs: 20+c=24

    Subtract: c=4

    So four people ordered a chicken sandwich.
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