Question

what should be added to twice the rational number
$- \frac{ 7}{3} \: to \: get \: \frac{3}{7}$

Answer 1

twice of rational number
$- \frac{ 7}{3} = - \frac{7}{3} \times 2 \\ = \frac{ - 14}{3}$
now let the number added be x
so we have
$- \frac{14}{3} + x = \frac{3}{7} \\ x = \frac{3}{7} + \frac{14}{3} \\ x = \frac{9}{21} + \frac{98}{21} \\ = \frac{107}{21}$
so
$\frac{107}{21} should \: be \: added \\ hope \: it \: helps \: dear \:$
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