At the city museum, child admission is $5.40 and adult admission is $9.50 . On Tuesday, tickets 145 were sold for a total sales of $992.10 . How many adult tickets were sold that day?

Question

anonymous · Answer

@eliassaab @RadEn ?

anonymous · Answer

@Zale101 ?

raden · Answer

well, according information above. we can form 2 equations :

x + y = 45
5.4x + 9.5y = 992.10
solve for y 

with y for adult ticket, and x for child ticket

raden · Answer

by using elimination method is works

raden · Answer

sorry, the first equation should be x+y=145 not x+y=45

now times 5.4 the 1st equation, get
5.4x + 5.4y = 783

now subtracts both equations :
5.4x + 9.5y = 992.10
5.4x + 5.4y = 783
------------------- (-)
4.1 y = 209.1
y = 749.1/4.1 = 51

so, there are 51 for adult tickets were sold