Question

{3х+у=1
х+у=5пажулуста памагите рещать

Answer 1

$left { {{3x+y=1} atop {x+y=5}} right. left { {y=1-3x} atop {x+1-3x=5}} right. left { {{y=1-3x} atop {x=-2}} right. left { {{3*(-2)+y=1} atop {x=-2}} right. left { {{y=7} atop {x=-2}} right.$