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x in (-oo:+oo)
x+1/4 = (2/3)*x-(1/108) // - (2/3)*x-(1/108)
x-((2/3)*x)+1/4+1/108 = 0
x+(-2/3)*x+1/4+1/108 = 0
1/3*x+7/27 = 0 // - 7/27
1/3*x = -7/27 // : 1/3
x = -7/27/1/3
x = -7/9
x = -7/9
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