Titik potong dari 2x-5y=15 3x+4y=11

2x - 5y = 15   lx3l
3x + 4y = 11  lx2l
------------------------
6x - 15y = 45
6x + 8y = 22
------------------------- -
-23y = 23
y = -1

2x - 5y = 15
2x - 5(-1) = 15
2x + 5 = 15
2x = 15 - 5
2x = 10
x = 10 / 2
x = 5

titik potong (5, -1)