设丢翻图x岁去世
(1/6)x+(1/12)x+(1/7)x+5+(1/2)x+4=x
(1)x=84
(2)(1/6)x+(1/12)x+(1/7)x+5=38
(3)(1/6)x+(1/12)x+(1/7)x+5+(1/2)x=x-4=80