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Simplify: $47 − − 5 − 7 .$

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\frac{2}{21}

\frac{- 1}{7}

\frac{1}{21}

\frac{1}{7}

answer is B.

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Detailed Solution

Given,

47 − − 5 − 7 .

To evaluate the given expression.
Taking the given fraction, the L.C.M of 7 and 7 is 7. Then simplifying,

⇒ 47 − − 5 − 7 ⇒ 47 − 57 ⇒ 4 − 5 7 ⇒ − 17

After evaluating, the answer is

− 17

.
Correct option is 2.

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