Answer:
The required equation is y=3x and number of cookies shared is 15.
Step-by-step explanation:
Given : Sarah and her 4 friends share some cookies. If each person gets 3 cookies.
To find : How many cookies were shared? Write a mathematical equation that represents this situation.
Solution :
Let y be the number of cookies shared and x be the number of person.
Each person gets 3 cookies.
i.e. 1 person = 3 cookies
So, x person = 3x cookies
Number of cookies shared is y=3x
Now, we have given x=5 (Sarah and her 4 friends)
So, Number of cookies shared is y=3(5)=15
Therefore, The required equation is y=3x and number of cookies shared is 15.