# How do you write an algebraic expression that models the word phrase "The amount of money you spent if you started with $40 and now have d dollars"?

##### 2 Answers

Jan 23, 2016

Let's call the amount spent

#### Explanation:

We know that the amount spent and the amount left adds up to

Or in another form (by subtracting

Jan 23, 2016

40 - a = d

#### Explanation:

let the amount of money spent be a

started with 40 and spent a is represented by : 40 - a

left with d , hence 40 - a = d