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y in (-oo:+oo)
y = 8-1.1429*(-8/7) // - 8-1.1429*(-8/7)
y-(-1.1429*(-8/7))-8 = 0
y-8-1.30617143 = 0
y-9.30617143 = 0 // + 9.30617143
y = 9.30617143
y = 9.30617143
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