Sagot :

Bonsoir,

a) 6x+2=5-4x

6x+4x = 5-2

10x = 3

x= 10/3

c) 3(2x-1)= 4(x+3)

6x-3 = 4x +12

6x-4x = 12 +3

2x = 15

x = 15/2

x= 7,5

b) 3x+6=5x-12

6+12 = 5x -3x

18 = 2x

x= 18/2

x = 9