Répondre :
A = 3(2x+7) = 6x +21
B = 3(-2z + 7) = -6z +21
C= 6c -21
D= -6n -21
E= +6y -21
F= -6p +21
A = 3((2x+7)
B=3(-2z+7)
c=3(2c-7)
d=(-3)(2n+7)
e=(-3)(-2y+7)
f=(-3)(2p-7)
A = 3(2x+7) = 6x +21
B = 3(-2z + 7) = -6z +21
C= 6c -21
D= -6n -21
E= +6y -21
F= -6p +21