Solve the system for x,y>0x, y > 0x,y>0: $$x^2 + y^2 = 25$
$x + y = 7$$
(3,4)(3, 4)(3,4) and (4,3)(4, 3)(4,3)
(5,0)(5, 0)(5,0) and (0,5)(0, 5)(0,5)
(1,6)(1, 6)(1,6) and (6,1)(6, 1)(6,1)
(2,5)(2, 5)(2,5) and (5,2)(5, 2)(5,2)