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Sagot :

LEMERCIERMATHIS6

Réponse:

bonjour

x-4+4=5+4

simplification

x=9

vérification 9-4=5

x-8+8=-2+8

simplification

x=6

vérification

6-8=-2

x-7+7=3+7

simplification

x=10

vérification

10-7=3

x-6+6=12+6

simplification x=18

vérification

18-6=12

x-4+4=3+4

simplification

x=7

Vérification

7-4=3

x-3+3=-5+3

simplification

x=-2

vérification

-2-3=-5

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