I need proof for the problem: What are the values of x and y? 50x+100y=900 x+1.5y=15.5 The answer is x=8 and 5=y. I simply guessed and my teacher requires proof. The proof cannot be a guess and check method.
Last edited by ceasar_19134; October 27th 2006 at 10:30 AM. Reason: ThePerfectHacker
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Originally Posted by ceasar_19134 I need proof for the problem: What are the values of x and y? 50x+100y=900 x+1.5y=15.5 The answer is x=8 and 5=y. I simply guessed and my teacher requires proof. That is proof! If it works that is your proof.
Originally Posted by ceasar_19134 I need proof for the problem: What are the values of x and y? 50x+100y=900 x+1.5y=15.5 The answer is x=8 and 5=y. I simply guessed and my teacher requires proof. The proof cannot be a guess and check method. Multiply the second equation by 50 to get the pair of equations: 50x+100y=900 50x+75y=775 Now subtract to get: 25y=125. And I expect you can take it from there. RonL
Originally Posted by ThePerfectHacker That is proof! If it works that is your proof. Sounds like a rather "Physics-y" proof if you ask me. -Dan
Originally Posted by topsquark Sounds like a rather "Physics-y" proof if you ask me. -Dan Why? The reason why you use a technique or method to solve a problem is because you do not want to guess through uncountably many possibilities
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