x - 4x/9 - 2x/9 = 60
9x-4x-2x = 60*9
3x= 60*9
x = 180要用文字不要用/这个，不然不采纳你还了我觉得对就采纳x - 4x/9 - 2x/9 = 60 【x-9分之4x-9分之2x=60 】9x-4x-2x = 60*9 【两边同乘以9得：9x 减 4x 减 2x = 60 乘 9】3x= 60*9 【3x = 60 乘 9】x = 180【两边同除以3得：x =60 乘 9 除 3 = 60 乘 3 = 180