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vaieri [72.5K]
3 years ago
14

A/2 - 1/2 and please explain!!

Mathematics
1 answer:
Tema [17]3 years ago
8 0

We need to know that:

\frac{a}{b}-\frac{c}{d}=\frac{a.d-b.c}{b.d}

\frac{a}{2}-\frac{1}{2}=\frac{a.2-2.1}{2.2}=\frac{2a-2}{4}=\frac{a-1}{2}

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