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