x - y = 3 dan 2x + 3y = 11 substitusi

x = 3 - y
2(3 - y) + 3y = 11
6 - 2y + 3y = 11
y = 5

x - y = 3          |x2
2x + 3y = 11   |x1

2x - 2y = 6
2x + 3y = 11
----------------- -
-5y = -5
y = 1

2x + 3y = 11
2x + 3(1) = 11
2x + 3 = 11
2x = 11- 3
2x = 8
x = 4

x dan y = 4 dan 1