数学题：丢番图的墓志铭：哲人丢番图，在此埋葬，寿命相当长，六分之一是童年，十二分之一是少年，又过了生命的七分之一，娶了新娘。五年后生了儿郎，不幸儿孑只活了父亲寿命的一半，先父四年亡。丢番图到底寿多长？（由“秦子航-资优网”同学提问）

数学题解答：可以用方程解答，设丢番图活了x岁。

1/6 x + 1/12 x + 1/7 x + 5 + 1/2 x + 4 = x

解：

9/84 x = 9

x = 84

答：丢翻图活了84岁。

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