I think i solved a problem like this awhile back with some type of formula but i just can't remeber it.
Cinema tickets costs 110 $ for adults and 90 $ for kids. They sold 120 tickets for a total of 11640 $. How many adults saw the show?
Could you write the steps you take to solve this.
+118625 Cinema tickets costs 110 $ for adults and 90 $ for kids. They sold 120 tickets for a total of 11640 $. How many adults saw the show?
K+A=120
so K=120-A
110A+90K=11640
divide both sides by 10
11A+9K=1164
Sub in K=120-A
11A+9(120-A)=1164
11A+1080-9A=1164
2A=84
A=42
42 adults saw the show :)
