Question

The sum of two natural numbers is 20 while their difference is 4. Find
the numbers.

Answer 1

12 and 8 the sum is 20and the difference is 4

Answer 2

let the 2 natural no. be x and y
x+y = 20 ------ 1 equation
x -y = o4 ------2 equation

now,
comparing the equation 2 by 1
x+y = 20
x-y = 04
----------------
2x =24
----------------
x = 12

now , puting the value of x in equation 1

x+y =20
12+y =20
y = 20-12
y = 08

that's your answer