bonjour je bloque sur des exercice de mathematique , si vous pourvais maider sa serai super merci davance resoudre les equations suivante . a) 2x-7. le resultat

bjr

a) 2x - 7= 9 - 6x

2x - 7 + 7 + 6x = 9 - 6x + 6x + 7

2x + 6x = 9 + 7

8x = 16

x = 16/8

x =  2

b) 1 - 3x = 2x - 14

-3x -2x = -14 - 1

-5x = -15

x = -15/(-3)

x = 5

c) 10x+4= 3x+5

10x - 3x = 5 - 4

7x = 1

x = 1/7 ​

bonjour

2 x - 7  = 9 - 6 x

2 x + 6 x = 9 + 7

8 x = 16

x = 16/8 = 2

1 - 3 x = 2 x - 14

- 3 x - 2 x = - 14 - 1

- 5 x = - 15

x = 3

10 x + 4 = 3 x + 5

10 x - 3 x = 5 - 4

7 x = 1

x = 1/7