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y in (-oo:+oo)
-11.9 = y/3-2.3 // - y/3-2.3
2.3-(y/3)-11.9 = 0
-1/3*y-9.6 = 0 // + 9.6
-1/3*y = 9.6 // : -1/3
y = 9.6/(-1/3)
y = -28.80000029
y = -28.80000029
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