Question

Inversul nr a=(1pe3 - 1pe4):7pe12 este ...

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Answer 1

(1/3-1/4):7/12=1/12 · 12/7=1/7 ⇒ inversul este 7

Answer 2

$a=( \frac{1}{3}- \frac{1}{4}): \frac{7}{12} \\ a=( \frac{4}{12} - \frac{3}{12} ) * \frac{12}{7} \\ a= \frac{1}{7} \\ Inversul.lui.a= \frac{7}{1}$