WORD PROBLEM: Solve the word problem. In the space provided, type the answer without any spaces between the letters, numbers, or symbols.

Question

Let x and y be directly related. If x is 18 when y is 6, find y when x is 21.

 

Answer 1

The difference between ages of x and y is (18 - 6 =) 12 yrs. Person x is older than y. So, when x is 21 yrs old, y will be (21-12 =) 9 yrs old.