a) 9a = ...... = 12a                       

b) ...... –5m = –2m                           

c) ...... –3b = 0

 

N2.

2x – x + 4x – 3x


N3

a)  –(x – 5y)                                 

b)  x + (2y – 7) – z

 

N4

c) 4a ・ 16

d) 20c : 5


N5

a) 3 (4k – 5)                           

b) (b – 3) (–2)                          

c) 2 (4a + 5) – 4a


N6

(a + b) – (a – b) = (c + b) – (c – b)


N7

4a    3   2a = 6a + 3

4a   3   2a = 2a + 3

4a   3   2a = 24a

4a   3   2a = –2a


 



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