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 o f the pen?
2 answers:
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
<h2>Solution :</h2>
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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