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TEA [102]
3 years ago
15

7) c/a=d-r, for a thanks

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

\dfrac{c}{a}=d-r \\\dfrac{c}{a}/c=\dfrac{d-r}{c} \\a=\boxed{\dfrac{d-r}{c}}

Hope this helps.

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