aider moi svp ses le 73. urgent svp

a) 3(2x+4)-5
=6x+12-5
=6x+7

B) -3(1+2y)+3y
=-3-6y+3y
=-3y-3

c)7(3a-1)+5a
=21a-7+5a
=26a-7

d)5b(1-b)-2b
=5b-5b²-2b
=-5b²-3b

a) 3(2x+4)-5 =6x+12-5 =6x+7 B) -3(1+2y)+3y =-3-6y+3y =-3y-3 c)7(3a-1)+5a =21a-7+5a =16a-7