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v in (-oo:+oo)
(1/3)*v-(3/2) = -8/5 // + -8/5
(1/3)*v-(3/2)-(-8/5) = 0
(1/3)*v-3/2+8/5 = 0
1/3*v+1/10 = 0 // - 1/10
1/3*v = -1/10 // : 1/3
v = -1/10/1/3
v = -3/10
v = -3/10
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