Question

Реши систему уравнений методом подстановки:4х+у=8
5х+9=-6у
Ответ: ( ; )
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Answer 1

$\left \{ {{y=8-4x} \atop {5x+9=-6*(8-4x)}} \right.$

$\left \{ {{y=8-4x} \atop {5x+9=-48+24x\\}} \right.$

$\left \{ {{y=8-4x} \atop {5x-24x=-48-9}} \right.$

$\left \{ {{y=8-4x} \atop {-19x=-57}} \right.$

$\left \{ {{y=8-4x} \atop {x=3}} \right.$

$\left \{ {{y=8-4*3} \atop {x=3}} \right.$

$\left \{ {{y=8-12} \atop {x=3}} \right.$

$\left \{ {{y=-4} \atop {x=3}} \right.$