Question

what
should be added
- 2 to
get 5/7​

Answer 1

Answer:

let added be x

$x + 2 = \frac{5}{7} \\ x - 2 = \frac{5}{7} \\ x = \frac{5}{7} + 2 \\ x = \frac{5 \times 1 + 2 \times 7}{7 \times 1} = \frac{5 + 14}{7} = \frac{19}{7}$

Verification:

$\frac{19}{7} - 2 = \\ \frac{19 \times 1 - 2 \times 7}{7 \times 1} = \frac{19 - 14}{7} = \frac{5}{7}$