3 fish have the total weight of 15kg. the lightest fish is one quarter of the weight of the other 2 together and the heavest one is 1 kilo less than the other 2 together. how much is the weight of each fish
2007-03-18 19:09:47 · 5 answers · asked by you. 3 in Entertainment & Music ➔ Jokes & Riddles
3, 5, and 7
2007-03-18 19:15:41 · answer #1 · answered by Anonymous · 0⤊ 0⤋
the answer is elementary.
Fish #1 - 3 kg
Fish #2 - 5 kg
Fish #3 - 7 kg
Total weight is 15 kg
Fish #1 is one quarter of #2 & 3
Fish #3 is one kg less that #1 & 2.
2007-03-18 19:31:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋
x + y + z = 15
(x + y)/4 = z
x +1 = y + z
so 2x + 1 = 15 (subbing y + z in equation 1 with x + 1)
2x = 14
x = 7
y + z = 8
7 + y = 4z
y = 4z - 7
so, subbing in, 5z - 7 = 8
5z = 15
z = 3
x + y + z = 15
7 + y + 3 = 15
y = 5
2007-03-18 19:21:52 · answer #3 · answered by Son of a Mitch 6 · 0⤊ 0⤋
the lightest one is 3 kg, the second one is 5kg while the last one is 7 kg...
2007-03-18 20:01:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
3,5,7
2007-03-18 20:38:50 · answer #5 · answered by chaos 1 · 0⤊ 0⤋