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x in (-oo:+oo)
(3/8)*x = 1/2 // - 1/2
(3/8)*x-(1/2) = 0
(3/8)*x-1/2 = 0
3/8*x-1/2 = 0 // + 1/2
3/8*x = 1/2 // : 3/8
x = 1/2/3/8
x = 4/3
x = 4/3
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