1/3 х+1/4 х+1/8 х=34/45

1/3 х + 1/4 х + 1/8 х = 34/45;

Приведем к общему знаменателю 24:

8/24 х + 6/24 х + 3/24 х = 34/45;

17/24 х = 34/45;

х = 34/45 : 17/24;

х = 34/45 * 24/17;

х = 48/45;

1/3 * 48/45 + 1/4 * 48/45 + 1/8 * 48/45 = 34/45;

16/45 + 12/45 + 6/45 = 34/45;

34/45 = 34/45.