52книги расставили по трем полкам причем на первой полке оказалась на 3книги меньше чем на второй а на третьей на 4больше чем на второй сколько книг стоит на третьей полке
My brother Alex is a footballer and he is very fit. He usually (1)sleeps eight hours and doesn’t go to bed late . He does morning(2) exercises regularly and runs 10 km every day. Alex (3) doesn't like watching TV or playing computer games. He thinks it’s (4) better to ride a bike or walk in the park . Last year my brother (5) kept to a very strict diet of vegetables, water and fish before an important match. I hope Alex (6) make a very successful career in football because he is a real sportsman. sleep
My brother Alex is a footballer and he is very fit. He usually (1)sleeps eight hours and doesn’t go to bed late . He does morning(2) exercises regularly and runs 10 km every day. Alex (3) doesn't like watching TV or playing computer games. He thinks it’s (4) better to ride a bike or walk in the park . Last year my brother (5) kept to a very strict diet of vegetables, water and fish before an important match. I hope Alex (6) make a very successful career in football because he is a real sportsman. sleep
Х - 3 +х + х + 4 = 52
3х+1=52
3х=51
Х=17
ответ: 17 книг