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x in (-oo:+oo)
(2/7)*x-(1/3) = 2 // - 2
(2/7)*x-(1/3)-2 = 0
(2/7)*x-1/3-2 = 0
2/7*x-7/3 = 0 // + 7/3
2/7*x = 7/3 // : 2/7
x = 7/3/2/7
x = 49/6
x = 49/6
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