Jika nilai y=-10 dan 2x+11y= 15 maka nilai x adalah:

Y=-10
substitusi
2x+11(-10)=15
2x-110=15
2x=15+110
x=125/2
x= 62,5

.
2x + 11y = 15
2x + 11(-10) = 15
2x = 15+110
x = 125/2
x = 62,5