zad.7 str 111.Podręcznik matematyka z plusem nowa 2 kl gimnazjum zad7c {x-2y=3 {-2x+y=0 Proszę o szybkie rozwiązanie :**
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x - 2y = 3 /*2
-2x + y = 0
2x - 4y = 6
-2x + y = 0
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-3y = 6 /:(-3)
y = - 2
x - 2y = 3
x - 2 * (-2) = 3
x - (-4) = 3
x + 4 = 3
x = 3 - 4
x = -1
x = -1
y = -2
x-2y=3
-2x+y=0
x=3+2y
-2*(3+2y)+y=0
-6-4y+y=0
-3y=0+6
-3y=6 /:(-3)
y=-2
x=3+2*(-2)
x=3+(-4)
x=-1
y=-2
x=-1