tìm x thỏa mãn

21+13.(x+2) chia het cho 7

(332+128)+(527+143)

=460+670

=1130

What about you gping to swimming  tomorrow afternoon?

1) He is in grape 6.

2) He is twelve years old.

3) He live in Ha Noi.

4) He lives with his parents and sister.

5) He likes listening to music and fishing.

6) He plays soccer.

7) His sister does aerobics once a week on Friday.

8) His favourite subject at school are Math and English.

What above you going to swimming tomorrow afternoon?

(2x+23) thuoc B(x-1)

a)   (2n+1) chia hết cho 6-n

b)    3n chia hết cho n-1

c)      n mũ 2 +4  chia hết cho n+2

(3x4-12) chia het cho 3