Question

{x^2+y^2=25 {x+y=7 помогите

Answer 1

$left { {{x^{2} +(7-x) ^{2}=25 } atop {y=7-x}} right.$
$x^{2} +49-14x+ x^{2} -25=0$
$2 x^{2} +14x-24=0 |:2$
$left { {{ x^{2} +7x-12=0} atop {y=7-x}} right.$$left { {{x1=4; x2=3} atop {y=7-4; y=7-3} left } right.$