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At the movie theatre, child admission is 6.20
and adult admission is 9.60
. On Tuesday,
tickets were sold for a total sales of 1016.60
. How many child tickets were sold that day?

Respuesta :

6.20c+9.60a=1016.60
c+a=136

a=136-c
6.20c+9.60(136-c)=1016.60
6.20c+1305.60- 9.60c=1016.60
-3.40c = 1016.60 - 1305.60
-3.40c=-289
c=289/3.4 = 85

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