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x in (-oo:+oo)
2*x-(1/3) = 7 // - 7
2*x-(1/3)-7 = 0
2*x-1/3-7 = 0
2*x-22/3 = 0 // + 22/3
2*x = 22/3 // : 2
x = 22/3/2
x = 11/3
x = 11/3
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