Question 1046127
Let represent the first side:
x + (3x-24) + (x+4) = 35ft
5x = 55ft
x = 11 ft, the length of the first side, 
Second is 9ft {{{3*11 - 24}}}and third 15ft {{{11+4}}}

AND
11ft + 91ft + 15ft = 35ft  CHECKS!