Szczegółowe wyjaśnienie:
[tex]\left \{ {{4x+y=12} \atop {6x+8y=14}} \right.\\ \left \{ {{y=12-4x} \atop {6x+8(12-4x)=14}} \right. \\\left \{ {{y=12-4x} \atop {6x+96-32x=14}} \right.\\ \left \{ {{y=12-4x} \atop {-26x=-82/:(-26)}} \right. \\\left \{ {{y=12-4x} \atop {x=\frac{41}{13} }} \right. \\\left \{ {{y=12-4*\frac{41}{13}=12-\frac{164}{13} =12-12\frac{8}{13}=-\frac{8}{13} } \atop {x=3\frac{2}{13} }} \right. \\\left \{ {{y=-\frac{8}{13} } \atop {x=3\frac{2}{13} }} \right.[/tex]
