Metode gabungan (eliminasi dan subtitusi) 1. 2x+8y-1=0 x+5y+2=0 2. x+y=3 3x+2y=-2

NO. 1
eliminasi
2x + 8y = 1 |x1| 2x + 8y = 1
x + 5y = 2 |x2| 2x + 10y= 4
----------------- -
-2y= -3
y= -3/2

substitusi
2x - 8 (-3/2) = 1
2x - (-24/2) = 1
2x - (-12) = 1 HP = {-11/2, -3/2)
2x + 12 = 1
2x = 1 - 12
2x = -11
x = -11/2

NO. 2
eliminasi
x + y = 3 |x3| 3x + 3y = 9
3x + 2y = -2 |x1| 3x + 2y = -2
----------------- -
y = 11
substitusi
x + 11 = 3
x = 3 - 11
x = -8

HP = {-8, 11}