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v in (-oo:+oo)
2*v+7*v+7/5+2/6 = 8 // - 8
2*v+7*v+7/5+2/6-8 = 0
9*v-94/15 = 0 // + 94/15
9*v = 94/15 // : 9
v = 94/15/9
v = 94/135
v = 94/135
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