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Step * of Lemma rmul-rdiv-cancel5

∀[a,b,c:ℝ].  ((b/a) * (a/c)) = (b/c) supposing a ≠ r0 ∧ c ≠ r0
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Latex:

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Latex:
\mforall{}[a,b,c:\mBbbR{}].    ((b/a)  *  (a/c))  =  (b/c)  supposing  a  \mneq{}  r0  \mwedge{}  c  \mneq{}  r0


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Latex:
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