/sci/ - Science & Math

Anonymous Mon May 7 05:19:21 2012 No.4656285 [View]
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Hey guys, got a test back last week and got 90 something. I just have a quick question I didnt get any marks for this Q because I didnt use the correct method according to her. I believe I did use the correct method (substitution). Can you help me prove that I used the right method, even if it was partially used?

We also got asked to solve the same question but with elimination instead, got that method ok. So we were getting marked on the method, so i got 0/5. Even some of the marks back would be appreciated!

Many thanks

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/sci/ - Science & Math

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