1/x + 2/y = 1 3/x + 10/y = 4 dengan cara metode gabungan eliminasi dan substitusi

1/x + 2/y = 1 |x 3|
3/x + 10/y = 4

3/x + 6/y = 3
3/x + 10/y = 4
------------------ -
-4/y = -1
y = 4

Subtitusi y = 4 ke 1/x + 2/y = 1
1/x = 1 - 2/y
1/x = 1 - 2/4
1/x = ½
x = 2

HP : { 2 , 4 }