the difference between a number and its three - fifths is 50 . what is the number ?
"suppose the number is n . then n - 3 ⁄ 5 n = 50 ⇒ 2 n ⁄ 5 = 50 ∴ n = 50 × 52 = 125 answer . c"
power(add(50, const_4), const_4)