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x in (-oo:+oo)
(2/7)*x-(1/3) = x+3/5 // - x+3/5
(2/7)*x-x-(1/3)-(3/5) = 0
(2/7)*x-x-1/3-3/5 = 0
-5/7*x-14/15 = 0 // + 14/15
-5/7*x = 14/15 // : -5/7
x = 14/15/(-5/7)
x = -98/75
x = -98/75
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