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v in (-oo:+oo)
(7*v-7)/2 = (5*v+2)/8+2 // - (5*v+2)/8+2
(7*v-7)/2-((5*v+2)/8)-2 = 0
(7*v-7)/2+(-1*(5*v+2))/8-2 = 0
(8*(7*v-7))/(2*8)+(-1*2*(5*v+2))/(2*8)+(-2*2*8)/(2*8) = 0
8*(7*v-7)-1*2*(5*v+2)-2*2*8 = 0
46*v-60-32 = 0
46*v-92 = 0
(46*v-92)/(2*8) = 0
(46*v-92)/(2*8) = 0 // * 2*8
46*v-92 = 0
46*v-92 = 0 // + 92
46*v = 92 // : 46
v = 92/46
v = 2
v = 2
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