设希腊学家丢番图寿终时的岁数为x,根据题意,列方程:
(1/6)x+(1/12)x+(1/7)x+5+(1/2)x+4=x
x-(1/6)x-(1/12)x-(1/7)x-(1/2)x=9
(3/28)x=9
x=84
答:希腊学家丢番图活了84岁.
设希腊学家丢番图寿终时的岁数为x,根据题意,列方程:
(1/6)x+(1/12)x+(1/7)x+5+(1/2)x+4=x
x-(1/6)x-(1/12)x-(1/7)x-(1/2)x=9
(3/28)x=9
x=84
答:希腊学家丢番图活了84岁.