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