Metode subtitusi dari x-y=3 dan 2x+3y=11

x - y = 3
x = 3 + y

2x + 3y = 11

substitusikan
2x + 3y = 11
2(3+y) + 3y = 11
6 + 2y + 3y = 11
5y = 11 - 6
5y = 5
y = 1

x = 3 + y
x = 3 + 1
x = 4