Фанэтычны разбор слова жыццё

пусть х км - весь путь, 0,4х км первый день, (х-0,4х)*0,25=0,15х км - второй день, 18 км - третий день.

складываем уравнение:

0,4х + (х-0,4х)*0,25 + 18 = х 

0,4х + 0,15х +18 = х

0,55х +18 = х

18 = х-0,55х

0,45х = 18

х = 40 (км) - весь путь.

ответ: 40 км прошли туристы за три дня.

1 день - 40%

2 день - 25% от 60%

3 день - 18км

75% = 18

25 - ?

1) 18*25/75 = 6 (км) - прошли за второй день.

2) 6+18 = 24 (км) - прошли за второй и третий день.

60% = 24

40% - ?

3) 24*40/60 = 16 (км) - прошли за первый день.

4) 16+24 = 40 (км) - прошли за три дня.

ответ: 40 км прошли туристы за три дня. 

dear tanya, thank you to you for a letter and for that you with such warmth think of me. as i wanted once again to go with you somewhere in autumn. you remember when we with you went for a walk it was very merrily on a past weekend. rambled on a park and collected leaves in bouquets. were glad to a sun and spent time simply well. after a walk we decided to go out into the cinema and look an interesting film about the adventures of little mouse. because this was the premiere of film,of that all waited, we had bought the last tickets. i have the very good impressions after this film. you remember as we got hungry and went out into a cafe. we ordered large pizza and on a delicious ice-cream. lately got cold, and in mid air smells in winter. will you arrive on these weekend? did snow fall out already for you? in the north did a ski season begin already? with love there is ira.