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x in (-oo:+oo)
(1.25*x)/5 = (0.75*x)/3 // - (0.75*x)/3
(1.25*x)/5-((0.75*x)/3) = 0
(1.25*x)/5-0.25*x = 0
0 = 0
x należy do R
x in (-oo:+oo)
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