SOLUTION: The solve the system using the Linear combination mathod. 21x-8y=-1 9x+5y=8

Algebra ->  Algebra  -> Linear-equations -> SOLUTION: The solve the system using the Linear combination mathod. 21x-8y=-1 9x+5y=8      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 16545: The solve the system using the Linear combination mathod.
21x-8y=-1
9x+5y=8
Answer by kikerkins(17) About Me  (Show Source):
You can put this solution on YOUR website!
21x-8y=-1
9x+5y=8

Let's solve for X first
5(21x-8y=-1)
8(9x+5y=8)
Distribute.
105X-40Y=-5
72X+40Y=64
Add down
177X=59 ( the Y's cancel)

X=59/177
Now plug 59/177 in for X
9(59/177)+5y=8
513/177+5Y=8
5Y=301/59
Y=301/295