A trader bought some oranges at 5c each She finds that 6 of them are rotten. She sells the rest at 8c each and makes a profit of $4,50. How many oranges did she buy? (Hint: let the number of oranges be x. Work in cents.)
She paid 5X cents in total. She sold 8(X -6). The profit was 450 cents. So: 5X = 8(X-6) -450. 5X + 450 = 8X -48 3X = 402 X = 402/3 = 134. She bought 134 oranges.
