C-12-Q131mediumsingle_mcqIf x+y=4x + y = 4x+y=4 and x−y=2x - y = 2x−y=2, then (x,y)=(x, y) =(x,y)= —a(2,4)(2, 4)(2,4)b(4,2)(4, 2)(4,2)c(3,1)(3, 1)