假设四个人依次买了a,b,c,d个鸡蛋,大娘共有x个鸡蛋,则
a = (1/3)x - 4
b = (x - a)(1/4) + 5
c = (x - a - b)(1/2) + 1
d = (8/9)c
a + b + c + d = x
解出来后,x=72
即大娘共卖出72个鸡蛋.
假设四个人依次买了a,b,c,d个鸡蛋,大娘共有x个鸡蛋,则
a = (1/3)x - 4
b = (x - a)(1/4) + 5
c = (x - a - b)(1/2) + 1
d = (8/9)c
a + b + c + d = x
解出来后,x=72
即大娘共卖出72个鸡蛋.