Bonjour !
a)
[tex]x+2=10 \\ x = 8[/tex]
b)
[tex]x - 2 = 6 \\ x = 8[/tex]
c)
[tex]5x - 1 = 9 \\ 5x = 10 \\ x = \frac{10}{5} = 2[/tex]
d)
[tex]5x-14=3x+1 \\ 5x = 3x + 15 \\ 2x = 15 \\ x = \frac{15}{2} = 7.5[/tex]
e)
[tex]12x-14=x+8 \\ 11x - 14 = 8 \\ 11x = 22 \\ x = \frac{22}{11} = 2[/tex]
f)
[tex]15-3x=-5+2x \\ - 5x + 15 = - 5 \\ - 5x = - 20 \\ x = \frac{ - 20}{ - 5} = 4[/tex]
g)
[tex] \frac{1}{3} x + 5 = 9 \\ \frac{1}{3} x = 4 \\ x = 12[/tex]
h)
[tex] \frac{1}{2} x - 3 = 2 \\ \frac{1}{2}x = 5 \\ x = 10[/tex]
i)
[tex] \frac{2}{3} x + \frac{2}{5} = \frac{3}{5} \\ \frac{2}{3} x = \frac{1}{5} \\ x = \frac{3}{10} [/tex]
j)
[tex]3(x+4)=0 \\ x + 4 = 0 \\ x = - 4[/tex]
k)
[tex]2(2x+1)=18 \\ 2x + 1 = 9 \\ 2x = 8 \\ x = 4[/tex]
l)
[tex]5(4x+5)=12x+41 \\ 20x + 25 = 12x + 41 \\ 8x + 25 = 41 \\ 8x = 16 \\ x = \frac{16}{8} = 2[/tex]
Bonne journée
