Question

What number should be added to -2 upon 7 to get 1 upon 5

Answer 1

$\large \pink{ \underline{ \underline{ \sf \: Solution : \: \: \: }}}$

Let ,

$\star$The unknown number be x

According to the question ,

$\sf \implies x + ( - \frac{2}{7} ) = \frac{1}{5} \\ \\ \sf \implies x - \frac{2}{7} = \frac{1}{5} \\ \\ \sf \implies x = \frac{1}{5} + \frac{2}{7} \\ \\ \sf \implies x = \frac{7 + 10}{35} \\ \\ \sf \implies x = \frac{17}{35}$

Thus , the required number is 12/35