Mr. Johnson purchased 20 concert tickets for a total of $225. The concert tickets cost $15 for adults and $10 for children under twelve. How

Question

Mr. Johnson purchased 20 concert tickets for a total of $225. The concert tickets cost $15 for adults and $10 for children under twelve. How many tickets for children under twelve did Mr. Johnson purchase?

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Diễm Thu 2 weeks 2021-07-22T07:00:25+00:00 2 Answers 1 views 0

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    0
    2021-07-22T07:01:39+00:00

    15a +10c=$225
    a + c = 20
    Rewrite the second equation so it has a value for c
    c= 20 -a
    Now using substitution method replace the c for the given value
    15a + 10(20-a)=225
    15a +200-10a=225
    Combine like terms
    5a +200=225
    5a=25
    a=5
    So 5 adult tickets were bought and 15 children tickets

    0
    2021-07-22T07:02:14+00:00

    Answer:

    15

    Step-by-step explanation:

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