nilai (x - y) yang memenuhi sistem persamaan linear tiga variabel x + y + 2z = 2 3y - 4z = -5 6z = 3

6Z=3
Z=3/6
Z=1/2

3Y-4Z=-5
3Y-4.1/2=-5
3Y=-5+2
3Y=-3
Y=-3/3
Y=-1

X+Y+2Z=2
X-1+2.1/2=2
X-1+1=2
X=2-0
X=2

X-Y=2-(-1)
=2+1
=3
#SEMOGA BENAR