Répondre :
a) 3 - (4x-7) - (2× + 3) - (6× + 6 ) = 0
4× -7 =0 ou 2x + 3 = 0 ou 6x + 6=0
4×=7 2×= -3 6× = -6
×=7/4 ×= -3/2 ×= -1
b) 2/3× + 1 -2=0 2/3× -1 =0 x = 3/2
c) 3/10× -4/5 -7/10 =0 3/10× - 39.3 =0 3/10× = 39.3 x = 1.31
4× -7 =0 ou 2x + 3 = 0 ou 6x + 6=0
4×=7 2×= -3 6× = -6
×=7/4 ×= -3/2 ×= -1
b) 2/3× + 1 -2=0 2/3× -1 =0 x = 3/2
c) 3/10× -4/5 -7/10 =0 3/10× - 39.3 =0 3/10× = 39.3 x = 1.31