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leva [86]
3 years ago
9

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?
Mathematics
1 answer:
kozerog [31]3 years ago
7 0

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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