nkslsj
09.09.2019 •
Mathematics
Tickets for a show are $70 for adults and $50 for children. for one evening performance, a total of 300 tickets were sold and the receipts totaled $17,200. how many adult tickets and how many child tickets were sold?
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Ответ:
70a + 50c= 17200
a. + c= 300
70a + 50c = 17200
-70a - 70c = -21000
-20c = -3800
c = 190 children tickets
a + 190= 300
a = 110 adult tickets
Ответ: