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x in (-oo:+oo)
(7*x+1)/4 = (x-1)/10 // - (x-1)/10
(7*x+1)/4-((x-1)/10) = 0
(7*x+1)/4+(-1*(x-1))/10 = 0
(10*(7*x+1))/(4*10)+(-1*4*(x-1))/(4*10) = 0
10*(7*x+1)-1*4*(x-1) = 0
66*x+14 = 0
(66*x+14)/(4*10) = 0
(66*x+14)/(4*10) = 0 // * 4*10
66*x+14 = 0
66*x+14 = 0 // - 14
66*x = -14 // : 66
x = -14/66
x = -7/33
x = -7/33
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