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x in (-oo:+oo)
2*b-(3*c) = 11/2 // - 11/2
2*b-(3*c)-(11/2) = 0
2*b-3*c-11/2 = 0
2*b-3*c-11/2 = 0
x należy do R
x in (-oo:+oo)
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