... you (to go) to work by bus yesterday? 2. I... (not to meet) her on Tuesday. 3. Last year I... (to make) cakes every week. 4. When... she ... (to get) up yesterday? 5. He... (not to understand) the teacher's explanation at the pr 1. maths lesson. 6. He ... (to shut) the shop at 6:00 yesterday. 7. I... (to see) him two minutes ago. 8. Tom ... (to sing) in the choir when he studied at school. 9. He ... (to feel) ill last night.

1. Clara is definitely at school right now.

2. It may rain.

3. Don't you remember me?

4.You may meet him at the station.

5. Apparently, he knows English well.

6. He probably took these documents.

7. Apparently, he didn't give an answer.

8.She may figure it out later.

9. Apparently, he didn't make a mistake.

10. It's probably not here.

11.She may write to you soon.

12. Apparently, they lived here then.

13.He probably left you a message.

14.Apparently, they don't have children.

15. She's probably joking.

Объяснение:

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