SOLUTION: The average of two numbers is 15. If one number is subtracted from twice the other number, the result is 21. Find the numbers.

Algebra ->  Customizable Word Problem Solvers  -> Numbers -> SOLUTION: The average of two numbers is 15. If one number is subtracted from twice the other number, the result is 21. Find the numbers.      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 890156: The average of two numbers is 15. If one number is subtracted from twice the other number, the result is 21. Find the numbers.
Found 2 solutions by alexlove054@gmail.com, MathTherapy:
Answer by alexlove054@gmail.com(10) About Me  (Show Source):
You can put this solution on YOUR website!
let the two numbers be x and y
(x y)/2=15.....1
x-2y=21.....2
from.equation 1 equate both sides
x y=2times 15
x y=30
from equation 2 make x the subject of the formula
x=21 2y....3
put x in equation 2
21 2y y=30
21 3y=30
collect like terms
3y=30-21
3y=9
divide both sides by 3
y=3
put y in equation 3
x=21 2(3)
x=27

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

The average of two numbers is 15. If one number is subtracted from twice the other number, the result is 21. Find the numbers.


Numbers are: highlight_green%28highlight_green%2817%29%29 and highlight_green%28highlight_green%2813%29%29

You can do the check!! 



If you need a complete and detailed solution, let me know!!



Send comments, “thank-yous,” and inquiries to “D” at MathMadEzy@aol.com.

Further help is available, online or in-person, for a fee, obviously. 



For FREE info and answers to questions about the ASVAB exam, the NYS 3 – 8 city/state wide exams,GENERAL

MATH and HOMEWORK QUESTIONS, or MATH QUESTIONS related to the Regents Integrated Algebra, 

Regents Geometry, Regents Algebra 2/Trigonometry, SHSAT, COOP/HSPT/TACHS, PSAT, SAT, ACT, SSAT/ISEE,

GRE, CLEP, and the TASC/GED, you can visit: http://asvabstudyzone.freeforums.net/.