Bonjour svp pour demain: a) 2x -2 = 2 B) 3z - 10 = 11. C) 1 - y = 0

Hello,

[tex]2x - 2 = 2 2x = 2 + 2 2x = 4 x = 4 : 2 = 2 [/tex]

[tex]3z -10 = 11 3z = 11 + 10 3z = 21 z = 21 : 3 = 7[/tex]

[tex]1 - y = 0 - y = 0 - 1 - y = - 1 y = 1[/tex]

Voilà.

a.2x-2=2
2x-2-2=0
2x-4=0
2x=4
x=4/2
x=2

b.3z-10=11
3z-10-11=0
3z-21=0
3z=21
z=21/3
z=7

c.1-y=0
-y=-1
y=1