Réponse :
Explications étape par étape
Bonsoir
... - ... = ...
- ▪️+ ▪️ -
7 + ... = 3
= ▪️ = ▪️ =
-8 + ..... = -8
2eme ligne :
7 + ... = 3
... = 3 - 7
... = (-4)
1ère colonne :
... - 7 = -8
... = -8 + 7
... = -1
3eme colonne :
... - 3 = -8
... = -8 + 3
... = -5
1ère ligne :
-1 - ... = -5
-... = -5 + 1
-... = -4
... = 4
2eme colonne :
4 - 4 = ...
... = 0
(-1) - 4 = -5
- ▪️ + ▪️ -
7 + (-4) = 3
= ▪️ = ▪️ =
-8 + 0. = -8
