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x in (-oo:+oo)
(3*x+4)/10+(8*x-6)/2 = -37 // + 37
(3*x+4)/10+(8*x-6)/2+37 = 0
(2*(3*x+4))/(2*10)+(10*(8*x-6))/(2*10)+(2*10*37)/(2*10) = 0
2*(3*x+4)+10*(8*x-6)+2*10*37 = 0
86*x-52+740 = 0
86*x+688 = 0
(86*x+688)/(2*10) = 0
(86*x+688)/(2*10) = 0 // * 2*10
86*x+688 = 0
86*x+688 = 0 // - 688
86*x = -688 // : 86
x = -688/86
x = -8
x = -8
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