Question

Suppose a seventh graders birthday is today, and she is 12 years old. How old was she 3 1/2 years ago? Write an equation, and use a number line to model your answer

Answer 1

he age of girl 3
`(1)/(2)` years ago is 8.5 years .

Explanation:

Given as :

The present age of seventh grader girl = 12 years

Let The age of her 3
`(1)/(2)` years ago = x years

So The age of girl
`(7)/(2)` years ago = x years

Now, According to question

The age of girl 3.5 years ago = 12 - 3.5

Or, The age of girl 3.5 years ago = 8.5 years

Hence The age of girl 3
`(1)/(2)` years ago is 8.5 years . Answer