Question 161089
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There's no better explanation than putting it into equation:
Let {{{x}}}= the number
{{{(-x)}}}=opposite the number
{{{1/(-x)}}} = reciprocal of the opposite
Condition:
Opposite the number times the reciprocal of the opposite = 1:
{{{(-x)(1/(-x))=1}}}
{{{(cross(-x)1)(1/cross(-x)1)=1}}}
{{{(-1)(-1)=1}}}
{{{1=1}}}
Thank you,
Jojo</pre>