Richard Posted February 20, 2008 Share Posted February 20, 2008 I need help. I forgot (somehow :oops: ) how to do this. Can someone help me? This is the substitution method for linear equation. The answer must be an ordered pair. 13. x-y=5 x+2y=7 Could you give me step by step tips? Thanks xD :oops: Sorry for all the trouble. Sig by CommanderSozo. Kiss him. Now. *The above post is not to be taken seriously. The above post contains sarcasm, and if you were offended by the above post, it is purely coincidental Sign here __________* If you use PdN, don't click this. Link to comment Share on other sites More sharing options...
pyrochild Posted February 20, 2008 Share Posted February 20, 2008 If you want to solve by substitution, here is how you do it. You solve one of the equations for a variable (x or y). It doesn't matter which one. So, x-y=5 can become x=y+5. Then, you substitute the equation on the right side of that (y+5) for x in the other equation (since x now = y+5). So x+2y=7 becomes (y+5) + 2y = 7. Find y in that equation (that's now the y of your ordered pair), it back into the first equation (x-y=5), and solve for x. You now have your ordered pair. Lemme know if you need more clarification - I might not get back to you right away, but I'm sure some other folks on the forum are good at math too. ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
vista? Posted February 20, 2008 Share Posted February 20, 2008 Oh god - I don't understand this! **faints** Despite the fact I'm good at maths, I'm not good at algebra. But like pyrochild said, there's bound to be more who actually understand this and will be able to help you. Link to comment Share on other sites More sharing options...
R3VENGE Posted February 20, 2008 Share Posted February 20, 2008 damn ive forgot too it was ages ago i did this but im year 9 and im working on level 8 stuff which only the top set works on (which is me ) psn id: R3V-fiR3 Link to comment Share on other sites More sharing options...
BoltBait Posted February 20, 2008 Share Posted February 20, 2008 This is not a "Homework Help" forum. Sorry. Click to play: Download: BoltBait's Plugin Pack | CodeLab | and how about a Computer Dominos Game Link to comment Share on other sites More sharing options...
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