# Solving system by Eliminatation!

-3x-3y=-6
X+6y=-8

 jcaron2 Posts: 983, Reputation: 1034 Senior Member #2 Jun 21, 2011, 08:22 PM
If you double the first equation, you can then add the two equations together and the y-terms will cancel. That will allow you to solve for x. Once you know x, you can just substitute its value into either of the equations, and solve for why.
 pinkey1995 Posts: 12, Reputation: 10 Junior Member #3 Jun 21, 2011, 08:32 PM
 pinkey1995 Posts: 12, Reputation: 10 Junior Member #4 Jun 21, 2011, 08:35 PM
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Quote:
 Originally Posted by jcaron2 If you double the first equation, you can then add the two equations together and the y-terms will cancel. That will allow you to solve for x. Once you know x, you can just substitute its value into either of the equations, and solve for why.
can you just solve it please?
 pinkey1995 Posts: 12, Reputation: 10 Junior Member #5 Jun 21, 2011, 08:37 PM
Comment on jcaron2's post
Quote:
 Originally Posted by jcaron2 If you double the first equation, you can then add the two equations together and the y-terms will cancel. That will allow you to solve for x. Once you know x, you can just substitute its value into either of the equations, and solve for why.
and thank youu so muccch!
 jcaron2 Posts: 983, Reputation: 1034 Senior Member #6 Jun 21, 2011, 08:42 PM

It'll just take a second if we work through it together.

What do you get when you double the first equation? (In other words, multiply every term by two).
 pinkey1995 Posts: 12, Reputation: 10 Junior Member #7 Jun 21, 2011, 08:43 PM
Comment on jcaron2's post
Quote:
 Originally Posted by jcaron2 If you double the first equation, you can then add the two equations together and the y-terms will cancel. That will allow you to solve for x. Once you know x, you can just substitute its value into either of the equations, and solve for why.
i got it! thankkkksss so mucccch!
 jcaron2 Posts: 983, Reputation: 1034 Senior Member #8 Jun 21, 2011, 08:44 PM
Or if you just want to know if you got the right answer, post what you got and I'll tell you if it's right.
 jcaron2 Posts: 983, Reputation: 1034 Senior Member #9 Jun 21, 2011, 08:45 PM
Good job!
 pinkey1995 Posts: 12, Reputation: 10 Junior Member #10 Jun 21, 2011, 08:48 PM
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Quote:
 Originally Posted by jcaron2 I can help YOU solve it, but I can't do your homework FOR you. It'll just take a second if we work through it together. :) What do you get when you double the first equation? (In other words, multiply every term by two).
i got it! -_-

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