Question

The sum of two numbers is twice their difference.
If one of the numbers is 10, find the other number.​

Answer 1

Let unknown number be 'x'

Given, The sum of two numbers is twice their difference, if one of the number is 10

x + 10 = 2 ( x - 10 )

x + 10 = 2x - 20

x = 30

So other number is 30