y

剑桥词典

used to represent the second of two numbers or names that are not known or stated , when the first is represented by "x"
未知（或未指明）的數（或名稱）（在兩個未知或未指明的數或名稱中，儅第一個用x代替時，y用來代替第二個）
If 2x = 3y and x = 6, then y = 4. 假設2x=3y且x=6，則y=4。
The children on trial were referred to as child X and child Y. 受試兒童被稱作兒童X和兒童Y。 返回 y