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x in (-oo:+oo)
(9/8)*x-(6/8) = (11/8)*x-(x/16)+6/16 // - (11/8)*x-(x/16)+6/16
(9/8)*x-((11/8)*x)+x/16-(6/8)-(6/16) = 0
(9/8)*x+(-11/8)*x+x/16-3/4-3/8 = 0
-3/16*x-9/8 = 0 // + 9/8
-3/16*x = 9/8 // : -3/16
x = 9/8/(-3/16)
x = -6
x = -6
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