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Mathis49
@Mathis49
May 2019
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Pouvez vous m'aider à résoudre la question d par le calcul s'il vous plaît
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Verified answer
Bonjour,
-2x+2y = -6
x+2y = 6
par substitution :
x =-2y+6
-2(-2y+6)+2y = -6
4y-12+2y = -6
6y = -6+12
y = 1
x+2y = 6
x+2 = 6
x = 4
d) 7x+2y = 12
-x+y = -3
pareil tu substitues y ds -x+y = -3
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Verified answer
Bonjour,-2x+2y = -6
x+2y = 6
par substitution :
x =-2y+6
-2(-2y+6)+2y = -6
4y-12+2y = -6
6y = -6+12
y = 1
x+2y = 6
x+2 = 6
x = 4
d) 7x+2y = 12
-x+y = -3
pareil tu substitues y ds -x+y = -3