Question

the sum of two numbers is 2/5 if one of them is 4/7 find the second number​

Answer 1

Answer:

6/35

Step-by-step explanation:

let the second number be x

$\frac{2}{5} + x = \frac{4}{7} \\ \frac{2 + 5x}{5} = \frac{4}{7} \\ 7(2 + 5x) = 4 \times 5 \\ 14 + 35x = 20 \\ 35x = 20 - 14 \\ \\ 35x = 6 \\ x = \frac{6}{35}$

Answer 2

Step-by-step explanation:

another number is 2/5-4/7 = -6/35