Відповідь:

x + 2(4x - 6) = 6

x = 2

2 + 2y = 6

y = 2

(x,y) = (2,2)

[tex]\left \{ {{4*2-6=2} \atop {2+2*2=6}} \right.[/tex]

[tex]\left \{ {{2=2} \atop {6=6}} \right.[/tex]

(x,y) = (2,2)