Réponses

2013-03-12T18:24:14+01:00

A=5x(a+9) = 5a+45
B=2x(a-4) = 2a - 8
C=3x(10+b) = 30 + 3b
D=5x(6-b)= 30 - 5b
E=(11+2c)x7 = 77 + 14c
N=(9-3c)x7= 63 - 21c
S=(d+8a)x8 = 8d + 64a
F=(2g-3c)x9 = 18g-27c

 

En espérant t'avoir aidé.

2013-03-12T18:25:10+01:00

A = 5*(a+9)

= 5a + 45

 

B = 2*(a-4)

= 2a - 8

 

C= 3*(10+b)

= 30 + 3b

 

D= 5*(6-b)

= 30 - 5b

 

E = 7*(11+2c)

= 77 +14c

 

N = 7*(9-3c)

= 63 -21c

 

S = 8*(d+8a)

= 8d +64a

 

F= 9*(2g-3c)

= 18g -27c