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x in (-oo:+oo)
3*x-(11/4) = -5 // + 5
3*x-(11/4)+5 = 0
3*x-11/4+5 = 0
3*x+9/4 = 0 // - 9/4
3*x = -9/4 // : 3
x = -9/4/3
x = -3/4
x = -3/4
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