Question 578653
I think there is a typo
it should be 3 less than twice the number of double rooms


single rooms rented be x
double rooms rented =y

x= 2y-3
x=2y-3
x=2y-3............(1)


cost

75y+64x=2244..............(2)

substitute x in (2)
75y+64(2y-3)=2244
75y+128y-192=2244
203y=2244+192
203y=2436
y=12 the number of double rooms

x=2y-3
plug y 

x=2*12-3
x=21  single rooms

m.ananth@hotmail.ca