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x in (-oo:+oo)
3*x-(3/4) = x-(7/2) // - x-(7/2)
3*x-x-(3/4)+7/2 = 0
3*x-x-3/4+7/2 = 0
2*x+11/4 = 0 // - 11/4
2*x = -11/4 // : 2
x = -11/4/2
x = -11/8
x = -11/8
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