Bonsoir,
a) 2x = 2+2
2x = 4
x= 4/2 = 2
b)
3z = 11+10
3z = 21
z= 21/3 = 7
c)
1= y
d)
5x = -39-1
5x = -40
x= -40/5 = -8
e)
3z = 9-2
3z = 7
z= 7/3
f)
6+2,3 = y
8,3 = y
g)
7+22 = 3x
29 = 3x
x = 29/3
h)
6z = -11 -5
6z = -16
z = -16/6 = - 8/3
i)
-9 - 11,2 = x
-20,2 = x
J)
9,7y = -1,7 +5,7
9,7y = 4
y = 4/9,7
Bonjour
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
z=21/3
z=7
c. 1-y=0
1-y+y=0+y
1=y
y=1
d. 1+5x=-39
1-1+5x =-39-1
5x =-40
x = -40/5
x=-8
e. 2+3z=9
3z=9-2
3z=7
z=7/3
f.6-y=-2,3
-y=-2,3-6
-y=-8,3
y=8,3
g. 7-3x=-22
-3x=-22-7
-3x=-29
3x=29
x=29/3
h. 5+6z=-11
6z=-11-5
6z=-16
z=-16/6
z=-8/3
i.-x-9=11,2
-x=11,2+9
-x=20,2
x=-20,2
j.9,7y-5,7=-1,7
9,7y=-1,7+5,7
9,7y=4
y=4/9,7
