Sagot :
Explications étape par étape
a. x + 7 = 3
x + 7 - 7 = 3 - 7
x = - 4
b. x + 7 = - 3
x + 7 - 7 = - 3 - 7
x = - 10
c. x - 7 = 3
x - 7 + 7 = 3 + 7
x = 10
d. x - 7 = - 3
x - 7 + 7 = - 3 + 7
x = 4
e. 4x = 8
4x/4 = 8/4
x = 2
f. 8x = 4
8x/8 = 4/8
x = 1/2
g. x/8 = 4
x/8 = 4/1
x * 1 = 4 * 8
x = 32
h. x/4 = 1/8
x * 8 = 4 * 1
x = 4/8 = 1/2
Réponse :
Explications étape par étape
Bonjour
Résoudre :
x + 7 = 3
x + 7 - 7 = 3 - 7
x = -4
x + 7 = -3
x + 7 - 7 = -3 - 7
x = -10
x - 7 = 3
x - 7 + 7 = 3 + 7
x = 10
x - 7 = -3
x - 7 + 7 = -3 + 7
x = 4
4x = 8
4x/4 = 8/4
x = 2
8x = 4
8x/8 = 4/8
x = 1/2
x /8 = 4
x/8 * 8 = 4 * 8
x = 32
x/4 = 1/8
x/4 * 4 = 1/8 * 4
x = 4/8
x = 1/2