SOLUTION: 5r-9s=-26, 9r+5s=38

Algebra ->  Human-and-algebraic-language -> SOLUTION: 5r-9s=-26, 9r+5s=38      Log On


   

Question 367530: 5r-9s=-26, 9r+5s=38
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
5r-9s=-26
9r+5s=38
multiply equation 1 by -9
& equation 2 by 5 to eliminate r
..
-45r+81s=234
45r+25s=190
add them up
106s= 424
s= 424/106
s= 4 plug value of s in equation 1
5r-36=-26
5r=36-26
5r=10
/5
r=2
...
m.ananth@hotmail.ca