Question

A bag contains some red and blue balls. If Jane removes 1 red ball from the bag, then$\frac{1}{7}$ of the remaining balls in the bag are red. If instead of 1 red ball, Jane removes 2 blue balls from the bag, then $\frac{1}{5}$ of the remaining balls in the bag are red. How many balls are there in the bag at first?

Answer 1

22 balls are there in the bag at first.