Réponse :
Explications étape par étape
Bonjour,
Exercice 1
a)
-5+4 = 3x-2x
-1 = x
b)
12x-6x = -18
6x= -18
x = -18/6 = -3
c)
16 -32 =2x
-16 = 2x
x= -16/2 =-8
d)
6x-18 =21
6x = 21 +18
6x = 39
x = 39/6 = 6,5
Exercice 2
36*4 = 144
144 = 144
Vrai
16/ 1/16 =1
16/16 = 1
1=1
Vrai
3*-2 -4 = -6-4 = -10
-2+15 = 13
-10 *13 = -130
Faux