Sagot :

lroumane

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

loulakar

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