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a in (-oo:+oo)
a+(3/5)*a-(2/9) = 14/45 // - 14/45
a+(3/5)*a-(2/9)-(14/45) = 0
a+(3/5)*a-2/9-14/45 = 0
8/5*a-8/15 = 0 // + 8/15
8/5*a = 8/15 // : 8/5
a = 8/15/8/5
a = 1/3
a = 1/3
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