What would be the equation to represent Jer's age if Jeri is 3 years younger than Laura, whose age is x?

Apr 24, 2017

See the solution process below:

Explanation:

Let's write Jer's age as $j$

And, Laura's age was given as $x$.

Because Jer is 3 years younger than Laura we can write:

$j = x - 3$

So, if Laura was $10$ we can substitute $10$ for $x$ giving:

$j = 10 - 3$

$j = 7$

This shows the equation gives the correct results, if Laura is $10$ then Jer is $7$ which is 3 years younger than Laura.