For the question : Rahul made three indian clay curry pots. he wants to see if he can place them in the oven at the same time.

the diameter of the second pot is 3/4 of the diameter of his first pot.

the diameter of the third pot is 5/2 cm wider than the diameter of his second pot.

the sum of the diameters of the three pots is 47.5

let y represent the diameter of rahuls first pot.

what equation represents the sum of the diameters of all three pots and what is the value of y?