Which ordered pair is the best estimate for the solution of the system of equations? y=-1/2x+4y=1/2x-3

If we add the 2 equations the terms in x dssappear and we get

2y = 1

so y = 1/2

Substitute in first equtaion:-

1/2 = - 1/2 x + 4

-1/2 x = 1/2 - 4 = - 7/2

x = - 7/2 * - 2 = 14/2 = 7

answer is (7, 1/2)