SOLUTION: A number added to 9. the result is then multiplied by 4 to get a new result of 120. What is the number please write equation.

Algebra ->  Equations -> SOLUTION: A number added to 9. the result is then multiplied by 4 to get a new result of 120. What is the number please write equation.      Log On


   

Question 238295: A number added to 9. the result is then multiplied by 4 to get a new result of 120. What is the number please write equation.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(9+X)*4=120
36+4X=120
4X=120-36
4X=84
X=84/4
X=21 ANS.
pROOF:
(9+21)*4=120
30*4=120
120=120