bjr
a.2x - 2 = 2
2x - 2 + 2 = 2 + 2
2x = 4
2x/2 = 4/2
x = 2
b.3z - 10 = 11
3z - 10 + 10 = 11 + 10
3z = 21
3z/3 = 21/3
z = 7
c.1 - y = 0
y = 1
d.1 + 5x = -39
5x + 1 - 1 = - 39 - 1
5x = -40
5x/5 = -40/5
x = -8
tu as compris - tu peux faire le reste
e.2 + 3z = 9
f.6 - y = 2,3
g.7 - 3x = -22
h.5 + 6z = -11
i. -x - 9 = 11,2
j.9,7y - 5,7 = -1,7