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12-15 = 8y-6y
-3 = 2y
-3/2 = y
2) 10-5y = 6y - 9
10 + 9 = 6y+5y
19 = 11 y
19/11 = y
12 - 8y = 15 - 6y
12 - 15 = 8y - 6y
-3 = 2y
y = -1,5
5(2-y) = 3(2y-3)
10 - 5y = 6y - 9
10 + 9 = 6y + 5y
19 = 11y
y = = 1,73
semoga benar, maaf jika salah :)