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x in (-oo:+oo)
0.75*x-(1/4) = 0.75 // - 0.75
0.75*x-(1/4)-0.75 = 0
0.75*x-1/4-0.75 = 0
0.75*x-1 = 0 // + 1
0.75*x = 1 // : 0.75
x = 1/0.75
x = 1.33333333
x = 1.33333333
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