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x in (-oo:+oo)
0.75 = (99/12)*x // - (99/12)*x
0.75-((99/12)*x) = 0
(-33/4)*x+0.75 = 0
0.75-33/4*x = 0 // - 0.75
-33/4*x = -0.75 // : -33/4
x = -0.75/(-33/4)
x = 0.09090909
x = 0.09090909
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