(a) Simplify \(\frac{3}{m + 2n} - \frac{2}{m - 3n}\) (b) A number is made up of two digits. The sum of the digits is 11. If the digits are interchanged, the...
(b) A number is made up of two digits. The sum of the digits is 11. If the digits are interchanged, the original number is increased by 9. Find the number.