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x in (-oo:+oo)
(3/2)*x = 4/5 // - 4/5
(3/2)*x-(4/5) = 0
(3/2)*x-4/5 = 0
3/2*x-4/5 = 0 // + 4/5
3/2*x = 4/5 // : 3/2
x = 4/5/3/2
x = 8/15
x = 8/15
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