Selesaikan sistem persamaan linear berikut dengan substitusi -2x - 5y =3 3x + 8y = -6

- 2x - 5y = 3
- 2x = 5y + 3
x = - 5/2 y - 3/2
disubtitusi ke pers :
3x + 8y = - 6
3(- 5/2 y - 3/2 ) + 8y = - 6
- 15/2 y - 9/2 + 8y = - 6 ( dikali 2)
- 15y - 9 + 16y = - 12
y = - 12 + 9
y = - 3
disubtitusi ke pers :
x = - 5/2 y - 3/2
x = - 5/2 ( -3) - 3/2
x = 15/2 - 3/2
x = 12/2
x = 6
hp = ( 6,-3)