PERSON QUANTITY A 2x B 3x C 8x=3x+120 SUM ?
Since we are given this triple proportion, we introduce 2x as an amount for A 3x as an amount for B 8x as an amount for C After that, we have this equation 8x - 3x = 120 dollars which gives us 5x = 120 x = 120/5 = 24. Thus, A obtained 2*24 = 48 dollars; B obtained 3*24 = 72 dollars and C obtained 8*24 = 192 dollars. The sum is 48 + 72 + 192 = 312 dollars. ANSWER