Matching expressions

This task is about algebraic expressions that describe practical situations.
Select a mathematical expression from below to describe each statement.
 

60 + x     60 – x     x – 60     60/x     x/60     60x

Question

a)  I have $60 to spend. I spend $x.  How much money do I have left?      
     The correct expression is .... (Choose one)

    • 60 + x

    • 60 – x

    • x – 60

    • 60/x

    • x/60

    • 60x

Question

b)  Each book costs $60, and I buy x books. How much have I spent?
     The correct expression is .... (Choose one)

    • 60 + x

    • 60 – x

    • x – 60

    • 60/x

    • x/60

    • 60x

Question

c)  I spend a total of $60 buying magazines. Each magazine costs $x.
     How many magazines did I buy?
     The correct expression is ...  (Choose one)

    • 60 + x

    • 60 – x

    • x – 60

    • 60/x

    • x/60

    • 60x

Question

d)  I spend $x on a shirt and still have $60 left. How much money did I have to start with?
     The correct expression is ...  (Choose one)

    • 60 + x

    • 60 – x

    • x – 60

    • 60/x

    • x/60

    • 60x