Problema Solution
THE ZOO CHARGES $9 FOR AN ADULT ADMISSION AND $5 FOR EACH CHILD. TOTAL BILL FOR 191 PEOPLE WAS $1095. HOW MANY ADULTS AND HOW MANY CHILDREN WENT TO ZOO?
Answer provided by our tutors
we can assume that x = # of children and y = # of adults. x+y=191 and (x*5)+(y*9)=1095.
we can see that it can be rewritten as y=191-x; (x*5((191-x)*9)=1095.
5x + 1719 - 9x = 1095
-4x = -624
x = 156. This is the number of children
so the number of adults are y = 191 -x = 191-156 = 35
The number of adults is 35.
we can check by:
156($5) + 35($9) = $1095