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x in (-oo:+oo)
(3/4)*x-(1/4) = 13/4 // - 13/4
(3/4)*x-(1/4)-(13/4) = 0
(3/4)*x-1/4-13/4 = 0
3/4*x-7/2 = 0 // + 7/2
3/4*x = 7/2 // : 3/4
x = 7/2/3/4
x = 14/3
x = 14/3
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