qcmdemath.net
equation a
x
+b=0
Afficher toutes les questions
2
x
+ 7 = 0
2
x
= –7
2
x
= 7
et donc
x
= 7/2
x
= –7/2
Vérification
3
x
– 7 = 0
3
x
= –7
3
x
= 7
et donc
x
= 7/3
x
= –7/3
Vérification
–3
x
+ 5 = 0
–3
x
= – 5
–3
x
= 5
et donc
x
= 5 + 3
x
= 5/3
x
= – 5/3
Vérification
–7
x
– 5 = 0
–7
x
= – 5
–7
x
= 5
et donc
x
= 5 + 7
x
= 5/7
x
= –5/7
Vérification
5
x
+ 4 = 7
5
x
= 7/4
5
x
= 7 – 4
5
x
= 7 + 4
et donc
x
= 3/5
x
= –3/5
Vérification
3
x
– 4 = 5
3
x
= 5 + 4
3
x
= 5 – 4
3
x
= –5/4
et donc
x
= – 3
x
= 3
x
= 1/3
x
= –5/12
Vérification
–5
x
+ 4 = 7
–5
x
= 7/4
–5
x
= 7 – 4
–5
x
= 7 + 4
et donc
x
= 3/5
x
= –3/5
x
= –11/5
Vérification
3
x
– 7 = – 10
3
x
= –3
3
x
= 17
3
x
= –17
et donc
x
= 1
x
= –17/3
x
= –1
x
= 17/3
x
= 20
Vérification
–8
x
+ 7 = – 10
–8
x
= –10/7
–8
x
= 10/7
–8
x
= –17
–8
x
= –3
et donc
x
= –3/8
x
= 17/8
x
= 3/8
x
= 20
Vérification
–8
x
– 7 = – 1
–8
x
= –1/7
–8
x
= 1/7
–8
x
= –8
–8
x
= 6
et donc
x
= –3/4
x
= 7/8
x
= 1
x
= –1
Vérification
5
x
+ 4 = 14
x
+ 4 = 14/5
5
x
= 14 – 4
5
x
= 14 + 4
et donc
x
= 14/5 - 4
x
= 2
x
= 18/5
Vérification
2
x
– 7 = 0
2
x
= –7
2
x
= 7
et donc
x
= 7/2
x
= –7/2
Vérification
–7
x
+ 5 = 0
–7
x
= – 5
–7
x
= 5
et donc
x
= 5 + 7
x
= 5/7
x
= – 5/7
Vérification
11
x
– 4 = 5
11
x
= 5 + 4
11
x
= 5 – 4
11
x
= –5/4
et donc
x
= – 11
x
= 9/11
x
= 1/11
x
= –5/44
Vérification
8 – 3
x
= 0
3
x
= –8
–3
x
= 8
–3
x
= –8
et donc
x
= 8/3
x
= 3/8
x
= –3/8
x
= –11
Vérification
5
x
+ 4 = 1
x
+ 4 = 1/5
5
x
= 1 – 4
5
x
= 1 + 4
et donc
x
= 1/5 – 4
x
= –3/5
x
= 1
Vérification
3
x
– 6 = – 10
3
x
= –16
3
x
= 16
3
x
= –4
et donc
x
= –16/3
x
= 16/3
x
= –4/3
x
= 4/3
Vérification
–5
x
– 7 = – 1
–5
x
= –1/7
–5
x
= 1/7
–5
x
= –8
–5
x
= 6
et donc
x
= –3/4
x
= 7/8
x
= 6/5
x
= –6/5
Vérification
7
x
+ 4 = 1
x
+ 4 = 1/7
7
x
= 1 – 4
7
x
= 1 + 4
et donc
x
= 1/7 – 4
x
= –3/7
x
= 5/7
Vérification
–7
x
+ 5 = 1
–7
x
= – 4
–7
x
= 4
–7
x
= 1/5
–7
x
= –1/5
et donc
x
= 4/7
x
= –4/7
x
= 1/5 - 7
x
= 1/5 +7
Vérification
OK
qcmdemath.net