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x in (-oo:+oo)
x+2/5 = 2*x-(11/7) // - 2*x-(11/7)
x-(2*x)+2/5+11/7 = 0
x-2*x+2/5+11/7 = 0
69/35-x = 0 // - 69/35
-x = -69/35 // * -1
x = 69/35
x = 69/35
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