Respuesta :

yanmanz118
let x = the unknown number

five more than a number = twice the number

x + 5 = 2x
5 = 2x - x
5 = x
( Balance method is used to solve )

substitution

x + 5 = 2x
5 + 5 = 2 x 5
10 = 10

answer : the unknown number is 5
Let the unknown number be x.

Given,

x + 5 = 2x 

x = 5

Hence, the number is 5.