class 10 math , Pair of linear equations

Class 10 math ,
chapter 3
exercise 3 (e)
A two  digit number is 4 times the sum  of its digits and
twice the product of the digits.
A two digit number  is 3 more than 4 times the sum of the digits.
If 18 is added to the number,
the digits are reversed.
The sum of digits of a two digit number is 15.
the number obtained by interchanging the digits exceeds the given numbers by 9.

A two digit number is such that the product of the digits is 35,
when 18 is added to the number,
the digits interchange their places.
the sum of two numbers is 35 and their difference is 13 .find the numbers

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