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y in (-oo:+oo)
2.68 = y/3 // - y/3
2.68-(y/3) = 0
2.68-1/3*y = 0 // - 2.68
-1/3*y = -2.68 // : -1/3
y = -2.68/(-1/3)
y = 8.04000008
y = 8.04000008
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