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x in (-oo:+oo)
(23/4)*x-1 = -2 // + 2
(23/4)*x-1+2 = 0
23/4*x+1 = 0 // - 1
23/4*x = -1 // : 23/4
x = -1/23/4
x = -4/23
x = -4/23
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