gbonjours besoin aide s'il vous plait pour des exercices pour resoudre des equations :
merci d'avance mettre les etapes dans vos reponces stp
a)2(x/3-1):x-1/3
b)(x-5)/7:-3
c)1/4x+1/8:-3/2x+1/2
d)(x-3)/2:2x+1
e)4x^2:3x
f)(2x-1)(x+3):0
x
2 (x/3 -11) = x-1/3
2x/3 -33 = x-1/3
2x -33 = x -1/3
3
2x -x = + 33 -1
3 3
2x -3x = +99 - 1
3 3
-x = -98 donc x = +98
3 3
b) (x-5) = -3 ---------------x/7 = +5/7 +3
7 x/7 = 5/7 +21/7
x/7 = 26/7
c) 1/4x +1/8 = -3/2x + 1/2 = 2/8x + 1/8 = -3/2x +1/2
2/8x +3/2x = -1/8 + 1/2
2/8x 12/8x = -1/8 +4/8
14/8 x = +3/8
d) (x-3)/2 = 2x +1
x/2 -2x = +3/2 +1 = -x = 3/2 + 2/2 =-x =+5/2 = x = -5/2
e) 4x fois 2= 3x = 8x = 3x = 5x
f) (2x-1) = 0 (x+3) = 0
2x=1 x= -3
x=1/2
