Answer :
5x - 3y + 1 = 16 ⇒ 10x - 6y + 2 = 16
2x + 5y + 0 = -6 ⇒ 10x + 25y + 0 = -6
31y + 2 = 10
-2 -2
31y = 8
31 31
y = 8/31
5x - 3(8/31) + 1 = 16
5x - 24/31 + 1 = 16
5x + 7/31 = 16
-7/31 -7/31
5x = 10 24/31
5 5
x = 2 24/155
(x, y) = (2 24/155, 8/31)
2x + 5y + 0 = -6 ⇒ 10x + 25y + 0 = -6
31y + 2 = 10
-2 -2
31y = 8
31 31
y = 8/31
5x - 3(8/31) + 1 = 16
5x - 24/31 + 1 = 16
5x + 7/31 = 16
-7/31 -7/31
5x = 10 24/31
5 5
x = 2 24/155
(x, y) = (2 24/155, 8/31)