For integral value of y, the term should have an integral value or 3x + 20 should be a multiple of 98.
Let us assume
3x + 20 = 98
⇒ x = 26
Therefore, y = 53
If we put 3x + 20 equal to other multiples of 98 then the value obtained for y i.e., paise will be more than 100 which can be converted into rupees and the obtained answer will not satisfy the given condition.