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1 October, 13:01

A total of 330 children and adults attended a school play. There were 21 times as many children in attendance as there were adults.

This situation is modeled by the given system of equations, where a represents the number of adults and c represents the number of children.

c = 21a

a + c = 330

How many children attended the play?

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Answers (1)
  1. 1 October, 16:19
    0
    315 children

    Step-by-step explanation:

    a + 21a = 330 {substituted 21a, in for c, into second equation}

    22a = 330 {combined like terms}

    a = 15 {divided each side by 22}

    15 adults attended

    c = 21a {first original equation}

    c = 21 (15) {substituted 15,
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