tentukan hp 2x+3y=30,x+y=10

2x + 3y = 30   |×1|    2x + 3y = 30
x + y = 10       |×2|    2x + 2y = 20

eliminasi
2x + 3y = 30
2x + 2y = 20
----------------- (-)
y = 10

subtitusi
x + y = 10
x + 10 = 10
x = 0

jadi HP = {(0,10)}

2x + 3y = 30 (x1) 2x + 3y = 30
x + y = 10. (x2) 2x + 2y = 20
----------------------- -
=> y= 10
per 2
x + y = 10
x + 10 = 10
x = 0

y = 10
x = 0
maka hpnya {0,10}