Given:
AD = 7x - 5
CB = 5x - 2
We are asked to find x.
recall, in polygon, diagonal are equal.
Since AD and CB are diagonals, therefore they are equal.
So,
AD = CB
7x - 5 = 5x - 2
let's collect like terms:
7x - 5x = 5 - 2
carry out both the addition and subtraction operations:
2x = 3
Divide both sides by 2
2x/2 = 3/2
x = 3/2
Therefore, the correct option is D, which is 3/2.