Люди добрые, памaгити! решите уравнение. а) 0,3(8-3y)=3,2-0,8(y-7) б) 2x/5=x-3/2

1. i can’t find my book anywhere . i have looked all over the house. 2. johnny lives somewhere near chicago. 3. it so happened that he had nowhere to go to. so last summer he stayed at home in his beloved city for his holidays. 4. this book can be found nowhere . let’s buy it. 5. do you live anywhere near them? 6. is it anywhere in russia? — yes, it’s somewhere in russia. 7. where are you going? — i am not going anywhere . 8. i put my dictionary somewhere yesterday and now i can’t find it anywhere . — of course, that is because, you leave your books everywhere . 9. you must go somewhere next summer. 10. did you go anywhere on sunday? 11. let’s go somewhere . the weather is fine. i don’t want to stay at home in such weather. 12. i cannot find my glasses anywhere . i always put them somewhere and then look for them fo; hours. 13. today is a holiday. the streets are full of people. there are flags, banners and flowers everywhere.

ответ:

а) -64

б) 15

пошаговое объяснение:

а) 0,3   (8-3y) = 3,2 - 0,8(y-7)

3,2 - 2,4 - 0,8y + 0,9y + 5,6 = 0

6,4 = - 0,1y

y= - 64

б)   умножим на 5 обе части

получим:

4x = 5x - 15

-x = -15

x= 15

а) 2,4-0,9у=3,2-0,8у+5,6

-0,9у+0,8у=8,8-2,4

-0,1у=6,4

у=-64

б) 2х=5(х-3/2)

2х=5х-7,5

2х-5х=-7,5

-3х=-7,5

х=-7,5/-3=2,5

143*2=70 ост1 на100 43