Answer:
4n = 56 is the equation
Explanation:
You have 56 marbles to share with your friends.
Each friend gets exactly 4 marbles.
Let the number of friends be 'n'
The equation would be
= 4
By cross multiplication
4n = 56 will be the equation required to get the value of n
n =

n = 14
number of friends are 14.