the mean of 42,35,x,y,32 and 50 is
问题描述：
the mean of 42,35,x,y,32 and 50 is
the mean of 42,35,x,y,32 and 50 is 38.If the first three items have their sign reversed,the mean becomes 3.Find the value of x.
答
42, 35, X, Y, 32以及50的意思等于38. 如果前三项的标记倒过来的话,那意思就变成3了.请找出 X值.