Пусть в каждом вагоне первоначально было по х тонн угля. Если из первого вагона выгрузили 12 тонн угля, то в нем осталось (х - 12) тонн. Если з второго вагона выгрузили 22 тонны угля, то в нем осталось (х - 22) тонны. Известно, что в первом вагоне угля осталось в 6 раз больше. Если мы количество угля во втором вагоне увеличим в 6 раз и его будет 6(х - 22), то угля в обоих вагонах станет поровну. Составим уравнение и решим его.
6(x - 22) = x -12;
6x - 132 = x - 12;
6x - x = 132 - 12;
5x = 120;
x = 120 : 5;
x = 24 (т).
ответ. 24 тонны.
1) slept
2) left
3) rang up
4) cooked
5) looked
6) told
7) learnt
8) translated
9) had
4.
1) a) does he often tell lies?
B) is he telling lies now?
C)did he tell
D) will he tell
E) has he told
2) a) where does the kitten usually play
B) where is the kitten playing
C) where did the kitten play
D) where will the kitten play
C) Where has the kitten played
4 ) a) who does usually look
B) who is looking
C) who did look
D) who will look after
E) who has looked after
5) a) which of your friend does often swim
B) which of your friend is swimming
C) which of your friend did swim
D)which of your friend will swim
E)which of your friend has just swum
6) a) what jam does your Granny usually make
B) what jam is your Granny making
C) what jam did your Granny make
D) what jam will your Granny make
E) what jam has your Granny made