The sum of two numbers is 30. the difference of the two number is 4. what number is lesser

The lesser number is 13.

Step-by-step explanation:

Step 1 :

Let x represent the first number and y represent the second number

Given,  sum of  2 numbers  = 30

So we have,y + x  = 30

The difference of the 2 numbers = 4

so x - y = 4

Step 2 :

Adding the 2 equations obtained in step 2 we have,

2 x = 34 => x = 17

x + y = 30 => y = 30-x= 30 - 17 = 13

Step 3 :

Answer :

So 17 and 13 are the 2 numbers.

The lesser number is 13.

ab will be equal to