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x in (-oo:+oo)
2*x+((4/1)/2)*x = (1/4)*x-(7/3) // - (1/4)*x-(7/3)
2*x+((4/1)/2)*x-((1/4)*x)+7/3 = 0
2*x+(4/2)*x+(-1/4)*x+7/3 = 0
15/4*x+7/3 = 0 // - 7/3
15/4*x = -7/3 // : 15/4
x = -7/3/15/4
x = -28/45
x = -28/45
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