Sagot :
N°33
a = x = 2-3 x = -1
b = x = 2+3 x = 5
c = 3x = 2 x = 2/3
d = x/3 = 6/3 x = 6
N)34
a = 2x = 1-3 2x = -2 x = -1
b = 2x = 1+3 2x = 4 x = 2
c = 2x+6 = 1 2x = 1-6 2x = -5 x = -5/2
d = 2x-6 = 1 2x = 1-7 2x = -6 x = -6/2 = -3
N°35
a = 6x -6 = 1 6x = 1+6 6x = 7 x = 7/6
b = 9x -6 = 4 9x = 4+6 9x = 10 x = 10/9
c = 2x +5 = 4 2x = 4-5 2x = -1 x = -1/2
d = 3x +28 = -56 3x = -56-28 3x = -84 x = - 28
tu fais pareil pour le 36
EXERCICE 33 :
x + 3 = 2
x + 3 - 3 = 2 - 3
x = - 1
x - 3 = 2
x - 3 + 3 = 2 + 3
x = 5
3x / 3 = 2 / 3
x = 2 / 3
x / 3 = 2
x / 3 *3 = 2*3
x = 6
EXERCICE 34 :
2x + 3 = 1
2x + 3 - 3 = 1 - 3
2x / 2 = - 2 / 2
x = -1
2x - 3 = 1
2x - 3 + 3 = 1 + 3
2x / 2 = 4 / 2
x = 2
2(x + 3) = 1
2x + 6 = 1
2x + 6 - 6 = 1 - 6
2x / 2 = -5 / 2
x = -5/2
2(x - 3) = 1
2x - 6 + 6 = 1 + 6
2x / 2 = 7 / 2
x = 7/2