Bonjour Je n’ai pas compris vous pouvez m’aider svp 2x + 1/2=5 2x - 3/2=8 -3x + 2/5= -15 5x + 1/3= 3 5x - 3/4 = 3 -5x + 1/5 = -7

bonjour,

2 x + 1/2 = 5

2 x = 5 - 1 /2

2 x =  5 - 0.5

2 x =  4.5

x =  2.25

2 x - 3/2 = 8

2 x = 8 + 1.5

2 x = 9.5

x =  4.75

- 3 x + 2/5 = - 15

- 3 x = - 15 - 2/ 5

- 3 x =  -  75/5 - 2 /5

- 3 x =  - 77 /5

-  15 x  /5  = - 77/5

-  15 x  = - 77

x = 77/15

5 x + 1/3 = 3

15 x /3  = - 1 /3 + 9/3

15 x =  8/3

45 x = 8

x = 8/45

continue