Question

At the city museum, child admission is
$5.40
and adult admission is
$8.70
. On Thursday, three times as many adult tickets as child tickets were sold, for a total sales of
$693.00
. How many child tickets were sold that day?

Answer 1

693=A*8.7+C*5.4
but C=3A

solve for A, and C

Answer 2

27.83