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x = 4 , y=3 , z=-3
Maka :
X-6y-2z=p
4-6(3)-2(-3)=p
4-18+6=p
-8=p -> P=-8
-x+5y+3z=q
-(4)+5(3)+3(-3)=q
-4+15-9=q
11-9=q -> q=2
3x-2y-4z=r
3(4)-2(3)-4(-3)=r
12-6+12=r
6+12=r -> r=18
Jdi nilai, p=-8, q=2 dan r=18