Вставить слова, в синей рамочке (v2, was, were, ving), это тоже надо использовать.

a)75, 4/47 × 18,15/16 - 75,4/47×17,15/16= (18,15/16-17, 15/16)×75, 4/47=1×75,4/47=75,4/47.

б)(4, 1/2- 3/4× 15/17)²+1/6=

1)3,4×15/17=3, 4/10 × 15/17= 34/10 × 15/17= 2/2×3/1= 1×3=3

2)4, 1/2 - 3= 1, 1/2. (1.5)

3)1.5²=1.5×1.5=2.25

4)2.25+ 1/6= 2, 25/100+1/6= 2, 1/4 + 1/6= 9/4+1/6=54/24+4/24= 58/24=29/12=2, 5/12

2)

а)2/3х+7/3х=18

2/3х+7/3х=9/3х= 3х

3х=18 х=18: 3 х=6

б)х-2, 1/8= 3, 1/20

х=2, 1/8+3, 1/20

х=5, 1/8+1/20 1/8+1/20=10/80+4/80=14/80=7/40

х=5, 7

dear helen,

how are the things going on? did something new happen in your life? i wanted to answer you immediately after receiving your letter. but i was working a lot during the last two weeks. so i was pressed for time and did not manage to carry out my intentions.

in my country spring has already set. it is quite warm and really sunny all days long. being at work i always imagine myself strolling down some parks. i wish you could join me! it would be funny! some days ago my friend advised me to read a very interesting book. i did it and i would like you to know this author. are you ready to read good litterature?

tell me more about your work and free time. are you satisfied with all this? what are your plans for this summer? maybe we will be able to meet one day?

truly yours,

jessica

детальніше тут:  

Last year, i travelled to mali to witness first hand the ancient tuareg way of life in the sahara desert in north and west africa i was immediately struck by the bright indigo veis worn by, i assumed, the women of this tribe. sat fascinated as yousseff showed me the ancient script of the tuareg's language which can be written from right left, left to right or top to bottom. unfortunately, as water holes are drying up and animals are dying because of recent droughts, many tuareg are now migrating to cities. "we are seeing the beginning of the end of the tuareg way of life," yousseff told me, sadly.