SOLUTION: The sum of two numbers21, and one number is twice the other.find the numbers.

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: The sum of two numbers21, and one number is twice the other.find the numbers.      Log On


   

Question 857344: The sum of two numbers21, and one number is twice the other.find the numbers.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Question States***

 x + y = 21    and y = 2x

 x + 2x = 21       |Substituting 2x  for y

   3x = 21

    x = 7, the smaller number.  14 the larger number