Question

The sum of two rational number is -4 if one number is -21/5 find other

Answer 1

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Let the required number be x.

According to Question,

$x + \frac{ - 21}{5} = - 4 \\ \\ x = - 4 + \frac{21}{5} \\ \\ x = \frac{ - 20 + 21}{5} \\ \\ x = \frac{1}{5} \\ \\ \\ verification \\ \\ \frac{1}{5} + \frac{ - 21}{5} = -4 \\ \\ \frac{1 + ( - 21)}{5} = - 4 \\ \\ \frac{1 - 21}{5} = - 4 \\ \\ \frac{ - 20}{5} = - 4 \\ \\ - 4 = - 4$

Hence ur answer is x = 1/5

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