( 157 - 75)  - ( 75 + 157 )

= 157 - 75 - 75 -157

= 157 - 157 - 75 - 75

= 0 - 75 * 2

= 0 - 150

= - 150

Hải nói đúng quá

sorry mik lộn là 1800 nha

rắc rối quá

đề thiếu ko có điều kiện thì phải

gọi số phải tìm là a

vì a chia 2,3,5 đều dư 1

=>a-1 thuộc B(2,3,5)

=>BCNN(2,3,5)=2*3*5=30

=>BC(2,3,5)=B(30)={0,2,3,5,6,...}

=>a-1 thuộc {0,2,3,5,6,...}

=>a thuộc {1,3,4,6,7,...}

mấy cái này là phân số à

1/ It isn't worth asking Ms. Hoa to help.

2/ Linh's parents wouldn't/ didn't let/ refused to let her buy/ get a cell phone.

3/ Loan asked Phong where he was going.

4/ We were annoyed by the way Khanh behaved at the party.

5/ I would have had to go to the bank if you hadn't lent me some money.

6/ Huy took no notice of his teacher's advice.

7/ His sister had to finish the homework in addition to writing an assignment.

8/ I played football almost every day during my childhood.

9/ Why don't we go to/ go and visit the museum this afternoon?

10/ Trang had difficulty in concentrating on her lesson because of the noise.

cảm ơn cậu tớ cũng nghĩ vậy

Bài 1:x=-2;y=-5

      2:không có giá trị x,y thỏa mãn

      3:x=-1;5

      4:Điều kiện x khác 2;3;4

      5:-3;-4;3;4

Nếu thu hoạch được thì ...