Gunakan metode subtitusi x+2y=5 x-3y=-10

x+2y=5 ...... x = - 2y + 5
x-3y=-10

x = - 2y + 5 substitusi ke x - 3y = -10
(- 2y + 5) - 3y = - 10
- 5y + 5 = - 10
- 5y = - 10 - 5
- 5y = - 15
y = - 15/ - 5
y = 3

y = 3 substitusi ke x + 2y = 5
x + 2(3) = 5
x + 6 = 5
x = 5 - 6
x = - 1

jadi x = -1 dan y = 3