Bonjour,

2(3x-4)=-7x+9

6x - 8 = - 7x + 9

6x + 7x = 9 + 8

13x = 17

x = 17/13

(4x-3)-8=5x-(2x-3)

4x - 3 - 8 = 5x - 2x + 3

4x - 5x + 2x = 3 + 3 + 8

x = 14.

2(3x-4)=-7x+9

6x - 8 = -7x+9

6x+ 7x = 9+8

13x  = 17

x =17/13

(4x-3)-8=5x-(2x-3)

4x - 3 - 8 = 5x - 2x + 3

4x - 11 = 3x + 3

4x - 3x = 3 + 11

x = 14