Odpowiedź:
[tex]\left \{ {{2x-4y=2)} \atop {x-6y=-7/*(-2)}} \right.[/tex]
[tex]\left \{ {{2x-4y=2} \atop {-2x+12y14}} \right.[/tex]
-------------------
8y=16/:8
y=2
2x-4*2=2
2x-8=2
2x=2+8
2x=10/:2
x=5
(x,y)=(5,2)
[tex]\left \{ {{3x-y=2} \atop {x+6y=7/*(-3)}} \right.[/tex]
[tex]\left \{ {{3x-y=2} \atop {-3x-18y=-21}} \right.[/tex]
--------------------------
-19y=-19/:(-19)
y=1
3x-1=2
3x=2+1
3x=3/:3
x=1
(x,y)=(1,1)
Szczegółowe wyjaśnienie:
