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x in (-oo:+oo)
(2/3)*x+8 = (1/4)*x // - (1/4)*x
(2/3)*x-((1/4)*x)+8 = 0
(2/3)*x+(-1/4)*x+8 = 0
5/12*x+8 = 0 // - 8
5/12*x = -8 // : 5/12
x = -8/5/12
x = -96/5
x = -96/5
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