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v in (-oo:+oo)
-1/4 = v/19.2 // - v/19.2
-(v/19.2)-1/4 = 0
-0.05208333*v-1/4 = 0
-0.05208333*v-1/4 = 0 // + 1/4
-0.05208333*v = 1/4 // : -0.05208333
v = 1/4/(-0.05208333)
v = -4.80000031
v = -4.80000031
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