Question

решите систему уравгегие методом подставте {у=-3х5х+3у=12}

Answer 1

$left { {{y=-3x} atop {5x+3y=12}} right. \ left { {{y=-3x} atop {5x+3(-3x)=12}} right. \ left { {{y=-3x} atop {5x-9x=12}} right. \ left { {{y=-3x} atop {4x=-12}} right. \ left { {{y=-3x} atop {x=-3}} right. \ left { {{y=-3*(-3)} atop {x=-3}} right. \ left { {{y=9} atop {x=-3}} right.$