Odpowiedź:
[tex]\left \{ {{4x-8y=7} \atop {-12x+y=2}} \right.[/tex]
[tex]\left \{ {{4x-8(2+12x)=7} \atop {y=2+12x}} \right.[/tex]
[tex]\left \{ {{4x-16-96x=7} \atop {y=2+12x}} \right.[/tex]
[tex]\left \{ {{x=-\frac{1}{4} } \atop {y=2+12x}} \right.[/tex]
[tex]\left \{ {{x=-\frac{1}{4} } \atop {y=2+12*\frac{1}{4} }} \right.[/tex]
[tex]\left \{ {{x=-\frac{1}{4}} \atop {y=2-3 }} \right.[/tex]
[tex]\left \{ {{y=-\frac{1}{4}} \atop {x=-1}} \right.[/tex]
Szczegółowe wyjaśnienie:
