# Question #ef32c

Nov 19, 2016

$a = c - b$ using the subtraction operation.

#### Explanation:

First let's have $a$ represent the age of the Eiffel tower or what we are trying to calculate.

Then let $c$ represent the current year.

Then let $b$ represent the year the Eiffel Tower was built.

We can then write and equation to calculate the age of the Eiffel Tower:

$a = c - b$ using the subtraction operation.