11. The sum of two numbers is 25. One number is 9 greater than the other. Find the numbers.
12. The diff erence between two numbers is 48. The ratio of the two numbers is 7 : 3, which means that we can let the fi rst number be 7x and the second number be 3x. What are the two numbers?
Supplementary angles sum to 180°.
19. The sum of two consecutive multiples of 5 is 55. Find these multiples.
20. The diff erence in the measures of two supplementary angles is 12°. Find the measure of the angles.
21. If 3 than 1
__ 5 of a number is 4 more
is the number?
__ 2 the number, what
17. A number is divided into two parts such that one part is 10 more than the other. If the two parts are in the ratio 5 : 3, fi nd the number and the two parts.
18. Paul’s father is currently 4 times as old as Paul. In 5 years, his father will be three times as old as Paul will be. Find their current ages.