x - y = 10
2x + y = 2
Can you show your work so I know what I did wrong?

Question

x - y = 10
2x + y = 2 
Can you show your work so I know what I did wrong?

anonymous · Answer

You need to get each variable on separate sides

accessdenied · Answer

What did you get as an answer?

anonymous · Answer

I got 4, -5. But my sister said it was wrong.

accessdenied · Answer

do you have your work?  We can possibly see what you did wrong.  :)
the answer is wrong, but it doesnt seem too far off

anonymous · Answer

No I erased it all.

accessdenied · Answer

hmm... okay
well, we can solve this with a few techniques.  I think its set up nicely for elimination (there's a y and a -y which will cancel), so we can just add the equations together.

anonymous · Answer

Can you show me how you would do it?

accessdenied · Answer

|dw:1333053747989:dw|
its not a great notation, but i think you can see what's going on -- adding together the terms on each side to eliminate a variable