- Two numbers have a sum of 24. Find the two numbers if the second number is 6 times the first one.
- The sum of four times one number plus two times a second number is eight. The sum of three times the first number plus 5 times the second number is 24. Find the numbers.
- Sarah is three times as old as her sister Jenny. In nine years the sum of their ages will be 26. How old are they now?