(1)设丢番图活了x岁,那么
1/6x + 1/7x + 5 +1/2x + 11 = x
7/42x + 6/42x + 21/42 + 16 = x
x - 34/42x = 16
8/42x = 16
x = 84
(2) 84 X 1/7 = 12
(3)12+42=54
答:他活了84岁.丢番图结婚时是12岁,他儿子死时他是54岁.
(1)设丢番图活了x岁,那么
1/6x + 1/7x + 5 +1/2x + 11 = x
7/42x + 6/42x + 21/42 + 16 = x
x - 34/42x = 16
8/42x = 16
x = 84
(2) 84 X 1/7 = 12
(3)12+42=54
答:他活了84岁.丢番图结婚时是12岁,他儿子死时他是54岁.