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x in (-oo:+oo)
(140/4)*x-(1/4)+1 = 0
(140/4)*x-1/4+1 = 0
35*x+3/4 = 0 // - 3/4
35*x = -3/4 // : 35
x = -3/4/35
x = -3/140
x = -3/140
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