Bonjour !
a)
[tex]3x+2=x+6 \\ 2x + 2 = 6 \\ 2x = 4 \\ x = \frac{4}{2} \\ \boxed{x = 2}[/tex]
c)
[tex]2x - 4 = 5x +3 \\ - 3x - 4 = 3 \\ - 3x = 7 \\ \boxed{x = - \frac{7}{3} }[/tex]
b)
[tex]5x + 2 = 3x +9 \\ 2x + 2 = 9 \\ 2x = 7 \\ \boxed{x = \frac{7}{2} = 3.5}[/tex]
d)
[tex]7x + 2 = −3x+1 \\ 10x + 2 = 1 \\ 10x = - 1 \\ \boxed{x = - \frac{1}{10} = - 0.1}[/tex]
Bonne journée
