+111 ok, don't answer the entire problem. I have this (in one bracket):
{2x+-4y=4
{-3x+10y=14
For the elimination method, can i mutiply both equations? or use addition?
You can always multiply or divide both sides of any equation by anything, to get it looking how you'd like it to.
Your first equation has a 2x term. Your second equation has a -3x in it.
If you were to multiply your first equation by 3, you'd turn its x term into 6x
What can you do to your second equation to make its x term become -6x?
You'll then have one equation containing 6x, while the other contains -6x,
and you could add them together and the x terms will resemble matter meeting antimatter!
Good luck! 
You can always multiply or divide both sides of any equation by anything, to get it looking how you'd like it to.
Your first equation has a 2x term. Your second equation has a -3x in it.
If you were to multiply your first equation by 3, you'd turn its x term into 6x
What can you do to your second equation to make its x term become -6x?
You'll then have one equation containing 6x, while the other contains -6x,
and you could add them together and the x terms will resemble matter meeting antimatter!
Good luck!
