SOLUTION: I need to solve the following by elimination: 3x+2y=-I1 x-2y=11 I get -5/2, 17/4). The correct answer is (3,-4). I don't understand how that answer was reached. Can you p

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: I need to solve the following by elimination: 3x+2y=-I1 x-2y=11 I get -5/2, 17/4). The correct answer is (3,-4). I don't understand how that answer was reached. Can you p      Log On


   

Question 1064396: I need to solve the following by elimination:
3x+2y=-I1
x-2y=11
I get -5/2, 17/4). The correct answer is (3,-4). I don't understand how that answer was reached. Can you please show me how it is worked out.
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!

I think you must have copied it wrong.  To have the solution
(3,-4) it would have to be

system%283x%2B2y=1%2C%0D%0Ax-2y=11%29

not 

system%283x%2B2y=cross%28-I1%29%2C%0D%0Ax-2y=11%29


Put a 1 where you have -I1 then it comes out the answer (3,-4).
You can eliminate y just by adding the two equations term by 
term.

If you have trouble tell me in the thank-you note form below
and I'll get back to you by email.

Edwin