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x in (-oo:+oo)
-3/8 = -6*x // + -6*x
-(-6*x)-3/8 = 0
6*x-3/8 = 0
6*x-3/8 = 0 // + 3/8
6*x = 3/8 // : 6
x = 3/8/6
x = 1/16
x = 1/16
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