Question

решит систему уравнения x+y=6, 3x-5y=2

Answer 1

$left { {{x+y=6} atop {3x-5y=2}} right. left { {{x=6-y} atop {3x-5y=2}} right.\ \3(6-y)-5y=2 \18-3y-5y=2 \18-8y=2 \-8y=2-18 \-8y=-16 \y=2 \x=6-2 \x=4 \(x,y)=(4,2)$

Answer 2

Х+У=6
3х-5у=2

У=6-х
3х-5*(6-х)=2

У=6-х
3х-30+5х=2
8х=32
Х=4

У=6-4=2

Х=4
У=2