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x in (-oo:+oo)
3/2 = 3*x-(4/7) // - 3*x-(4/7)
3/2-(3*x)+4/7 = 0
3/2-3*x+4/7 = 0
29/14-3*x = 0 // - 29/14
-3*x = -29/14 // : -3
x = -29/14/(-3)
x = 29/42
x = 29/42
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