tentukan koordinat titik potong garis 3x + 5y = 2 dan garis 2x - 7y =3

3x + 5y = 2 |x2| 6x + 10y = 4 (i)
2x - 7y = 3 |x3| 6x - 21y = 9 (ii)

(i) 6x + 10y = 4
(ii) 6x - 21y = 9
---------------------- -
31y = 13
y = 13/31

3x + 5y = 2
3x + 5(13/31) = 2
3x + 65/31 = 2 |x31|
93x + 65 = 62
93 x = -3
x = - 3/93
x = -31

{x,y} = {-31,13/31}