Решите уравнение: 2/3/4/9x-4/9+1/20=4/5.




693(1)

Спасибо большое выручил!

      2/3-------------- + 1/20 = 4/54/9х - 4/9       2/3--------------- =  4/5 - 1/204/9х - 4/9     2/3------------------ = 16/20 - 1/20  4/9х - 4/9     2/3------------- = 15/204/9х - 4/9     2/3------------- = 3/44/9х - 4/94/9х - 4/9 = 2/3 : 3/44/9х - 4/9 = 2/3 * 4/34/9х - 4/9 = 8/94/9х = 8/9 + 4/94/9х = 12/9х = 12/9 : 4/9х = 12/9 * 9/4х = 12/4х = 3