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y in (-oo:+oo)
8 = y/12.8 // - y/12.8
8-(y/12.8) = 0
8-0.078125*y = 0
8-0.078125*y = 0 // - 8
-0.078125*y = -8 // : -0.078125
y = -8/(-0.078125)
y = 102.4
y = 102.4
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