Solve the system for (x,y)(x, y)(x,y):
xy=12xy = 12xy=12 x+y=7x + y = 7x+y=7
(3,4)(3, 4)(3,4)
(4,3)(4, 3)(4,3)
(−3,−4)(-3, -4)(−3,−4)
Both a and b