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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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