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y in (-oo:+oo)
14 = (2/3)*y // - (2/3)*y
14-((2/3)*y) = 0
(-2/3)*y+14 = 0
14-2/3*y = 0 // - 14
-2/3*y = -14 // : -2/3
y = -14/(-2/3)
y = 21
y = 21
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