Question

Реши систему уравнений 2x-y=6
x-5,5y=3

Answer 1

Ответ:

$\left \{ {{2x-y=6} \atop {x-5,5y=3}} \right.$

$\left \{ {{y=-6+2x} \atop {x-5,5y=3}} \right.$

$\left \{ {{y=-6+2x} \atop {x-5,5(-6+2x)=3}} \right.$

$\left \{ {{y=-6+2x} \atop {x+33-11x=3}} \right.$

$\left \{ {{y=-6+2x} \atop {-10x+33=3}} \right.$

$\left \{ {{y=-6+2x} \atop {-10x=3-33}} \right.$

$\left \{ {{y=-6+2x} \atop {-10x=-30}} \right.$

$\left \{ {{y=-6+2x} \atop {x=3}} \right.$

$\left \{ {{y=-6+2*3} \atop {x=3}} \right.$

$\left \{ {{y=0} \atop {x=3}} \right.$

Ответ: x=3, y=0 или (3;0).