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(-4x+3y=15)*2 → -8x+6y= 30 [prsmaan 2]
[prsmaan 1]- [prsmaan 2]
→ 29x=27 jadi x=27/29
substitusikan x= 27/29 ke [prsmaan 2]
-216/29 + 6y= 30
6y= 30+ 216/29
6y= (870+216)/29
6y= 1086/29
y= 181/29
maka nilai ({p,q}) = ({27/29 , 181/29})
3p-2q= 81/29- 362/29= 281/29
Kalau salah maaf ya, sudah brusaha nih :-D
Jadiin yg best yaa :-D