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Bonsoir
x+2y=4 et 2x-y = 3
x = 4-2y 2(4-2y) -y =3
8 -4y-y =3
-5y = 3-8
y = -5/-5
y = 1
x = 4-2*1
x = 2
x+y=2 et x-y = 3
x = 2-y 2-y-y =3
-2y = 3-2
y = -1/2
x = 2- (-1/2)
x = 5/2
bonne soirée
bonjour,
qu'elle qu'un pourais m'aider ?
{x+2y=4 {x+y=2
{2x-y=3 {x-y=3
Bonsoir
x+2y=4 et 2x-y = 3
x = 4-2y 2(4-2y) -y =3
8 -4y-y =3
-5y = 3-8
y = -5/-5
y = 1
x = 4-2*1
x = 2
x+y=2 et x-y = 3
x = 2-y 2-y-y =3
-2y = 3-2
y = -1/2
x = 2- (-1/2)
x = 5/2
bonne soirée