Bonjour !
a)
[tex]2x - 2 = 2 \\ 2x = 4 \\ x = \frac{4}{2} \\ \boxed{x = 2}[/tex]
b)
[tex]3z - 10 = 11 \\ 3z = 21 \\ z = \frac{21}{3} \\ \boxed{z = 7}[/tex]
c)
[tex]1 - y = 0 \\ 1 = y \\ \boxed{y = 1}[/tex]
d)
[tex]1 + 5x = - 39 \\ 5x = - 40 \\ x = - \frac{40}{5} \\ \boxed{x = - 8}[/tex]
e)
[tex]2 + 3z = 9 \\ 3z = 7 \\ \boxed{z = \frac{7}{3} }[/tex]
f) pas d'équation
g)
[tex]7 - 3x = - 22 \\ - 3x = - 29 \\ \boxed{x = \frac{29}{3} }[/tex]
h)
[tex]5 + 6z = - 11 \\ 6z = - 16 \\ z = - \frac{16}{6} \\ \boxed{z = - \frac{8}{3} }[/tex]
i)
[tex] - x - 9 = 11.2 \\ - x = 20.2 \\ \boxed{x = - 20.2}[/tex]
j)
[tex]9.7y - 5.7 = - 1.7 \\ 9.7y = 4 \\\boxed{ y = \frac{4}{9.7} }[/tex]
Bonne journée
