Resoudre les equations

Réponse :

Bonjour

Explications étape par étape

2 + 3x = 8

2 - 2 + 3x = 8 - 2

3x = 6

3x/3 = 6/3

x = 2

6x + 1 = -11

6x + 1 - 1 = -11 - 1

6x = -12

6x/6 = -12/6

x = -2

105 = -25x + 30

105 - 30 = -25x

75 = -25x

x = -75/25

x = -3

-8x + 7 = -49

8x = 49 + 7

x = 56/8

x = 7