Keta Sold tickets for her school play at $s6 for students, and $9 for adults. She sold 15 adult tickets and made a sales total o
f $315. How many student tickets were sold?
1 answer:
Answer
Let x be the number of tickets sold to adults and y the number sold to students:
x + y = 315. But we know that y was double x, then :
y = 2x
Plug the value of y (in the 1st equation) by 2x:
x+ 2x = 315
3x = 315
and x = 105 (which is the number of tickets sold to adults
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