Question 1057788
Let av be the figure for The Avengers. Then Avatar would be 2av-.2, and Titanic would be 2av-.2-.6, or 2av-.8. So:
av+2av-.2+2av-.8=6.5
5av-1=6.5
5av=7.5
av=1.5
2av-.2=2.8
2av-.8=2.2
The Avengers earned 1.5 bil., Avatar earned 2.8 bil., and Titanic earned 2.2 bil. . ☺☺☺☺