[flossy]

1.$xy+x+y = 5......(1)$
$2xy+x+3y = 9......(2)$

2.$xy+2x+2y+1 = 0........(1)$
$3xy+3x+5y+3 = 0.......(2)$

3.$x^2+y^2+x-y-6 = 0.......(1)$
$2x^2+2y^2+3x+y-12 = 0.........(2)$

ขอขั้นตอนด้วยนะคะ ขอบคุณค่ะ