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23 August, 07:03

Mr. Johnson purchased 20 concert tickets for a total of $225. The concert tickets cost $15 for adults and $10 for children under 12. How many tickets for children under 12 did Mr. Johnson purchase?

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  1. 23 August, 07:09
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    15

    Step-by-step explanation:

    Let the number of adult tickets be x while children ticket be y. Since the total tickets were 20 then we can form the equation

    x+y=20

    Making x the subject then x=20-y

    Considering the cost of each ticket

    15x+10y=225

    Substituting x with 20-y then

    15 (20-y) + 10y=225

    300-15y+10y=225

    Collecting like terms

    300-225=15y-10y

    75=5y

    Y=75/5=15

    To find x, we already know that x=20-y hence x=20-15=5

    Therefore, children tickets are 15 while adult tickets are 5.

    The question only needs us to know the children tickets, y which is 15
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