Homework Help Forum: Math

Posted by Cody on Monday, May 28, 2007 at 11:10am.

I can't seem to do this problem. And my grade is riding on it. Can someone please help? I don't know how to solve it. Can someone help me by telling me what I'm doing wrong? The problem is 3y = 2x + 12 My Work: 0=2x+ 12 -------- 2 2 x=6 You cannot solve this equation. It has 2 unknowns. I can't seem to do this problem. And my grade is riding on it. Can someone please help? I don't know how to solve it. Can someone help me by telling me what I'm doing wrong? The problem is 3y = 2x + 12 My Work: 0=2x+ 12 How and/or why did you eliminate y from the equation. -------- 2 2 x=6 A ssuming you are seeking integer answers. 1--3y - 2x = 12 2--Dividing through by 2 yields y + y/2 - x = 6 3--y/2 must be an integer k mking y = 2k 4--Substituting back into (1)0 yields 6k - 2x = 12 making x = 3k - 6 5--CLearly, without any other conditions imposed by the problem statement, there are an infinite number of answers. 6--k...0...1...2...3...4...5...6.. ...x..-6..-3...0...3...6...9..12.. ...y...0...2...4...6...8..10..12.. Subjects Art Business Computers English Foreign Languages Health Home Economics Mathematics Music Physical Education Science Social Studies Features Contribute Download Experts Forum Job Openings Homework Tips Libraries.Jiskha Link to Us Reference School Supplies Search Homework Help Forum: Math Current Questions | Post a New Question | Answer this Question | Further Reading Posted by tchrwill on Monday, May 28, 2007 at 1:22pm in response to Math. download mp3 free instrumental remix I can't seem to do this problem. And my grade is riding on it. Can someone please help? I don't know how to solve it. Can someone help me by telling me what I'm doing wrong? The problem is 3y = 2x + 12 My Work: 0=2x+ 12 How and/or why did you eliminate y from the equation. -------- 2 2 x=6 A ssuming you are seeking integer answers. 1--3y - 2x = 12 2--Dividing through by 2 yields y + y/2 - x = 6 3--y/2 must be an integer k making y = 2k 4--Substituting back into (1) yields 6k - 2x = 12 making x = 3k - 6 5--Clearly, without any other conditions imposed by the problem statement, there are an infinite number of answers. 6--k...0...1...2...3...4...5...6..etc. ...x..-6..-3...0...3...6...9..12..etc. ...y...0...2...4...6...8..10..12..etc. http://www.jiskha.com/display.cgi?id=1180111741 http://www.jiskha.com/display.cgi?id=1180111741

• Math - moose, Monday, January 5, 2009 at 9:23pm

  oh this is easy just...wait i have my own homework to do and i don't even know you

  
  

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• amwfs avgr - amwfs avgr, Thursday, February 5, 2009 at 4:55am

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