Question

Translate to an algebraic expression.

Alex had x dollars before spending $16.50 for a book. How much did he have after the purchase?


A) $16.50 + x

B) x - $16.50

C) $16.50x

D) $16.50 - x

Answer 1

answer is

B) x - $16.50

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Answer 2

B) x - $16.50

Explanation:

The problem is asking you to create an algebraic expression, so when you are talking about spending, paying or giving, that is usually a withdrawal from the main account, when you know that number you use the number, since we don´t know the actual amount we will use "x" to express that so we will withdraw from "X" the amount spent:

x-16.50

And that would be the expression of how much was left.