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y in (-oo:+oo)
14 = (-7/4)*y // - (-7/4)*y
14-((-7/4)*y) = 0
(7/4)*y+14 = 0
7/4*y+14 = 0 // - 14
7/4*y = -14 // : 7/4
y = -14/7/4
y = -8
y = -8
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