Question

Sarah is 3 years older than nine times Mario's age. In 10 years, she will be 1 less than triple his

age. Which equation can be used to find Mario's current age?

Answer 1

3(9m + 13) - (m + 10) = 1

Explanation:

Here, we want to write an equation we can use to find the age of Mario.

Let the present age of Mario be M

Age of Sarah is 3 years older than 9

times Mario’s age

Mario’s age is thus;

9m + 3

In ten years, she will be 1 less than triple his age

In 10 years time, sarah age will be 9m +

3 + 10 = 9m + 13

Mario age will be m + 10

Mathematically;

3(9m + 13) - (m + 10) = 1