Explications étape par étape:

_. 7x - 3x = 8 + 2

4x = 10

x = 10/4.= 2,5

_ 13x + 4x = 9 - 5

17x = 4

x = 4/17

Verified answer

Bonjour,

7x - 2 = 3x + 8

7x - 3x = 8 + 2

4x = 10

4x / 4 = 10 / 4

x = 10 / 4 : 2 / 2

x = 5 / 2

13x + 5 = 9 - 4x

13x + 4x = 9 - 5

17x = 4

17x / 17 = 4 / 17

x = 4 / 17