Решите уравнение: 2/3/4/9x-4/9+1/20=4/5. 693(1)

Question

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




693(1)

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Answer 1

      2/3
-------------- + 1/20 = 4/5
4/9х - 4/9

       2/3
--------------- =  4/5 - 1/20
4/9х - 4/9

     2/3
------------------ = 16/20 - 1/20
  4/9х - 4/9

     2/3
------------- = 15/20
4/9х - 4/9

     2/3
------------- = 3/4
4/9х - 4/9

4/9х - 4/9 = 2/3 : 3/4
4/9х - 4/9 = 2/3 * 4/3
4/9х - 4/9 = 8/9
4/9х = 8/9 + 4/9
4/9х = 12/9
х = 12/9 : 4/9
х = 12/9 * 9/4
х = 12/4
х = 3

Comments

Спасибо большое выручил!