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8y + 12 - 2y = 12y + 9
6y + 12 = 12y + 9
12 - 9 = 12y - 6y
3 = 6y
3/6 = y
1/2 = y
y + 5 = 1/2 + 5 = 0,5 + 5 = 5,5
8y + 12 - 2y = 12y + 9
8y - 2y - 12y = 9 - 12
-6y = -3
y = -3/-6
y = 1/2 atau 0,5
Jadi, y + 5 adalah 0,5 + 5 = 5,5
Semoga membantu :)