Home/JLPT null/Vocabulary/未知数未知数🔊☆ Save to listみちすうMeaning—Kanji in this word未知数Example sentencesX記号は数学ではたいてい未知数を表す。The symbol "x" usually stands for an unknown quantity in mathematics.Related words屡々員数英数字過半数画数回数回数券奇数