titik potong aturan garis y=4x-11 dengan garis 3y=-2x-5 adalah...

y = 4x - 11
y - 4x = - 11

3y = - 2x - 5
3y + 2x = - 5

ttk potong
y - 4x = - 11
3y + 2x = - 5 |×2
maka
y - 4x = - 11
6y + 4x = - 10
-------------------(+)
7y = - 21
y = - 3

subtitusi
y - 4x = - 11
- 3 - 4x = - 11
- 4x = - 11 + 3
- 4x = - 8
x = 2

ttk potong ( 2,-3 )