Bonjour je dois résoudre ces deux équations: a=5(x-2)=2x+(x+6) b=12-(5x-9)=4x+3

a) 5 (x - 2) = 2x + (x + 6)
5x - 10 = 2x + x + 6
5x - 2x - x = 6 + 10
2x = 16
x = 16/2
x = 8

b) 12 - (5x - 9) = 4x + 3
12 - 5x + 9 = 4x + 3
- 5x - 4 = 3 - 12 - 9 
- 9x = - 18
x = - 18 / (- 9)
x = 2

a : 5(x-2)=2x+(x+6) --> 5x-5*2=2x+x+6 --> 5x-10= 3x+6 --> 5x-3x=6+10 --> 2x=16 --> x=16/2=8 b : 12-(5x-9)=4x+3 --> 12-5x+9=4x+3 -->21-5x=4x+3 -->21-3=4x+5x -->18=9x -->x=18/9=2