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v in (-oo:+oo)
1/8-((3/2)*v) = -9/2 // + -9/2
1/8-((3/2)*v)-(-9/2) = 0
(-3/2)*v+1/8+9/2 = 0
37/8-3/2*v = 0 // - 37/8
-3/2*v = -37/8 // : -3/2
v = -37/8/(-3/2)
v = 37/12
v = 37/12
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