SOLUTION: the sum of two number in 9.yhe difference between five times of the first and four times of the second is 9.what are that number.

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: the sum of two number in 9.yhe difference between five times of the first and four times of the second is 9.what are that number.       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 747462:

the sum of two number in 9.yhe difference between five times of the first and four times of the second is 9.what are that number.
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
X+Y=9 OR X=9-Y
5X-4Y=9
5(9-Y)-4Y=9
45-5Y-4Y=9
-9Y=9-45
-9Y=-36
Y=-36/-9
Y=4 ANS.
X=9-4
X=5 ANS.
PROOF:
5*5-4*4=9
25-16=9
9=9