Réponse :
Explications étape par étape
Bjr,
exercice 1
a) 8x = -3
x = -3/8
b) 2x=9
x= 9/2
c) 49= 7x
x= 49/7 = 7
d) -6x=5
x= -5/6
e) 5x = 3-12
5x = -9
x= -9/5
f) 10x = -7-1
x= -8/10 = -4/5
g) 9x = 6+2
x= 8/9
h) 20+4 = 4x
24=4x
24/4=x
x= 6
Exercice 2
a) 2x+2x = 8
4x= 8
x=8/4 = 2
b) -8-4 = 7x -4x
-12 = 3x
-12/3 = x
x = -4
c) 5+9 = 6x-3x
14 = 3x
x= 3/14
☺
