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x in (-oo:+oo)
x = (5/3)*x-(14/3) // - (5/3)*x-(14/3)
x-((5/3)*x)+14/3 = 0
x+(-5/3)*x+14/3 = 0
14/3-2/3*x = 0 // - 14/3
-2/3*x = -14/3 // : -2/3
x = -14/3/(-2/3)
x = 7
x = 7
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