dumbkid12
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A student bought a book for $7 and a pen. The total cost was $9. Which of the following equations can be used to find the cost of the pen?

Respuesta :

mathiscool77

Answer:

7+x=9

Step-by-step explanation:

if you subtract 7 from both sides of this you will get x=2 so the pen is $2

Solution :

Total cost = $9

Cost of book = $7

Let the cost of pen be = x

Thus,

x+$7=$9

x=$9-$7

x=$2

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