resoudre équation 1) 6x-21=0 2) 2x+5=-3x+35 merci =)

bonjour

1) 6 x - 21 = 0

  6 x = 21

     x = 21/6

2) 2 x + 5 = - 3 x + 35

  2 x + 3 x = 35 - 5

  5 x = 30

x = 6