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