Question

the sum of two rational numbers is ⁴/²¹. if one of them is ⁵/⁷,find the other

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Answer 1

Answer:

if the other number be $\frac{x}{y}$

Or, $\frac{x}{y} = \frac{4}{21}-\frac{5}{7} = \frac{4}{21}-\frac{15}{21} = \frac{-11}{21}$

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Step-by-step explanation:

Answer 2

→ Sum =

$\frac{4}{21}$

→ One of the number =

$\frac{5}{7}$

→ let the other number be 'x'

So, we got an equation to compute, i.e

$\frac{5}{7} + x = \frac{4}{21} \\ \\ x = \frac{4}{21} - \frac{5}{7} \\ \\ x = \frac{4 - 15}{21} \\ \\ x = \frac{ - 11}{21}$

∴ The other number which when added with 5/7 gives the sum as 4/21 is

$\frac{ - 11}{21}$

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