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Step * of Lemma rsub-rdiv

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

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


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Latex:
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