Verified answer

bjr

b)

(5*x - 2)*8 =                          (* = fois)

(5*x - 2)*8 =  

8*5*x - 2*8 =

40x - 16      

c)

(6 + 4*x) *2 =

2*6 + 2*4*x =

12 + 8x

e)

7*(x + 1) = 7*x + 7*1

             = 7x + 7