8y-3(2y-1)=6(y-1)+15
=........
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8y - 6y + 3 = 6y - 6 + 15
8y - 6y - 6y = -6 + 15 - 3
-4y = 6
8y - 6y + 3 = 6y - 6 + 15
2y + 3 = 6y + 11
2y - 6y = 11 - 3
-4y = 8
y = 8/-4
y = -2
Jadikan yang terbaik ya kalau membantu, terima kasih :)