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State true/false.

The rational numbers $− 7 21, 3 − 9$ are equal.

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True

False

answer is A.

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Detailed Solution

Given rational numbers are

− 7 21, 3 − 9

.
Multiplying the numerator and denominator of

− 7 21

− 9

(− 721) × (− 9 − 9) = 63 − 189

Multiplying the numerator and denominator of

3 − 9

by 21 ,

3 − 9 × 2121 = 63 − 189

The numerator and denominator of the above rational numbers are equal.
Therefore, the rational numbers

− 7 21, 3 − 9

are equal.
Thus, the given statement is true.
Hence, option (1) is correct.

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