The answer is
RS=3 x 2 + 1, ST= 2 x 4 -2, RT= 64, i'm sorry if it didn't help
C = $7s
independent variable ie the changing variable is s
dependent variable ie the non changing variable is c
Change 5/3 to 15/9. Then add 15 + 17 and put it over 9. 32/9