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3(4) - 2y = 6
12 - 2y = 6
-2y = 6 - 12
-2y = -6
y = 3
y = p = 3
Titik A
Karna sudah kita ketahui nilai dari variabel y=p, langsung saja substitusikan.
3(4)-2(p)=6
12-2p=6
-2p=6-12
-2p=-6
p=-6÷-2
p=3
Jadi, nilai p adalah 3