Réponse :
e. 6x+42=0
6x = -42
x = -42 / 6
x = -7
f. 5-2.5x=0
5 = 2.5X
5/2.5 = X
2 = X
X = 2
g.7x-1 = 0
7X = 1
X = 1/7
Explications étape par étape :
Bonsoir;
e. 6x+42=0
6x= -42
x = -42/6
x =-7
f. 5-2.5x=0
5 = 2,5x
x = 5/2,5
x = 2
g.7x-1=0
7x = 1
x = 1/7
