SOLUTION: How do You solve this problem? The subject is: Solving System of Equations in Three Variables. 4a-2b+8c=30 a+2b-7c=-12 2a-b+4c=15

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: How do You solve this problem? The subject is: Solving System of Equations in Three Variables. 4a-2b+8c=30 a+2b-7c=-12 2a-b+4c=15      Log On


   

Question 668314: How do You solve this problem? The subject is: Solving System of Equations in Three Variables.
4a-2b+8c=30
a+2b-7c=-12
2a-b+4c=15
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Solving this one is not possible, the 1st and 3rd equations are the same
Simplify the 1st by dividing by 2 and you have the 3rd equation,
not much to work with here