B = 5z + 3(z-2) -6z +12 C = 2 - 5(2t-7) - 6 - t Aidez moi svp

Salut,

b) [tex]5z+3(z-2)-6z+12=5z+3z-6-6z+12=2z+6[/tex]
c) [tex]2-5(2t-7)-6-t=2-10t+35-6-t=-11t+31[/tex]

B = 5z + 3z -6 -6z +12
B = 2z + 6

C = 2 - 10t + 35 - 6 - t
C = -11t + 31