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x in (-oo:+oo)
(3/8)*x = 6/8 // - 6/8
(3/8)*x-(6/8) = 0
(3/8)*x-3/4 = 0
3/8*x-3/4 = 0 // + 3/4
3/8*x = 3/4 // : 3/8
x = 3/4/3/8
x = 2
x = 2
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