tentuka koordinat titik potong garis x + y = 3 dan y = 2x - 1

x + y = 3
y = - x + 3

y = 2x - 1

y1 = y2
- x + 3 = 2x - 1
- x - 2x = - 1 - 3
- 3x = - 4
x = 4/3

subtitusi
y = 2x - 1
y = 2(4/3) - 1
y = 8/3 - 3/3
y = 5/3

ttk potong = ( 4/3 , 5/3 )