Question 320318
Let n = the number

(3/5) + 2(1/n) = 1

(3/5) + (2/n) = 1

5n * (3/5) + (2/n) * 5n = 1 * 5n

3n + 10 = 5n

10 = 5n - 3n

10 = 2n

10/2 = n

5 = n

Done!