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20 June, 20:03

Solve for the following: the price of a field trip is represented by P=$5a+$3c. If the price of the field trip is $85 and there are 20 children, c, how many adult are there?

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  1. 20 June, 20:35
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    P=$5a+$3c

    $85 = $5a+$3 (20)

    $85 = $5a + $60

    $85-$60 = $5a + $60-$60

    $25 = $5a

    $25/$5 = $5a/$5

    a = 5

    Check

    P=$5a+$3c

    $85=$5 (5) + $3 (20)

    $85=$25 + $60

    $85=$85
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