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1 December, 23:12

A teacher buys 50 train tickets for a school trip for a total cost of $1,200. She buys x number of student tickets for $20 each. She also buys y number of adult tickets for $30 each. How many adult tickets did she buy?

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  1. 2 December, 01:43
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    y=20, x = 30

    Step-by-step explanation:

    x+y=50;

    20x+30y=1200

    20x+20y=1000, multiplying the top by 20

    -20x-30y=-1200, subtracting the second.

    -10y=-200

    y=20 adult tickets ($600)

    x=30 student tickets ($600)

    (add up to $1200)
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