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x in (-oo:+oo)
(3/8)*x = 9/16 // - 9/16
(3/8)*x-(9/16) = 0
(3/8)*x-9/16 = 0
3/8*x-9/16 = 0 // + 9/16
3/8*x = 9/16 // : 3/8
x = 9/16/3/8
x = 3/2
x = 3/2
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