1. 17x-8=20x+7
17x-20x=7+8
-3x=15
x=5
2. х кг- младший,
3х кг-старший,
(х+13) кг -средний.
Всего- 88 кг яблок.
х+3х+х+13=88
5х=88-13
5х=75
х=75:5
х=15(кг)- яблок собрал младший брат.
3. 0,6(х+2)+4,6=0,4(7+х)
0,6x + 1,2+4=2,8+0,4x
0,6x+5,2=2,8+0,4x
0,6x-0,4x=2,8-5,2
0,2x=-2,4
x=-12
4. Пусть х л воды было в каждой цистерне первоначально, тогда
(х-54) л воды стало в первой цистерне, а
(х-6) л воды стало во второй цистерне.
Т.К. в первой стало в 4 раза меньше, чем во второй, то составим уравнение: 4(х-54)=х-6, 4х-216-х+6+0; 3х=210; х=70
ответ: в цистернах было по 70л воды
5. (3x+42)(4.8-0.6x)=0
3x+42=0 4.8-0.6x=0
3x=-42 -0.6x=4.8
x=-14 x=-8
Вроде все правильно..
1. When he entered the room, he saw Anna where he had left her. 2. I noticed when I entered,
that someone left their umbrella on the porch. 3. He did not read half the book, as he stated that
he doesn't like her. 4. When the guests left, she went into the living room and turned off the light. 5.
She sat on the sofa and wondered why her father's letter hadn't arrived yet. 6. Rain
it had stopped, but there was still a slight mist in the air. 7. I didn't know when he left. 8. He
I didn't remember his name, and I didn't remember ever having met him before. 9. We
we drove about two hours when we finally saw the lake. 10. It was some time before
than they realized that he had nothing to say. 11. when he Arrived home, he found out that his
my sister just left. 12. When the expedition returned, they said that they
seen in the Arctic.13. She had finished packing by the time her sister
she knocked on the door. 14. The last days were very cold, but the snow was not.15. When
everyone left, she went to the phone and quickly dialed the number. 16. When the parents
when they came back, I showed them what I had done. 17. my Mother tried to calm me down after
after you left. 18. I was surprised at the progress she made, given how little
it had been a long time since I'd seen her.19. he did Not have time to go to the
doors, how I met my school friends. 20. He again returned to Moscow, where
I lived with my parents as a child. 21. When they finally parted, he returned to the room
and went straight to the table. 22. It was much colder than she had anticipated. 23. I
I knew they had met before the war. 24. When everyone was gone, I carefully closed the door
the door. 25. When dawn broke, still blowing a Gale, but the snow had stopped.
Объяснение:
2 windy , rainy
3 snowy
4 foggy
5 stormy, cloudly
6 sunny