Recent content by ajohncock
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Undergrad How to Isolate Variables in a System of Differential Equations?
Man I've been looking at this and manipulating it for too long. I've got nothing! It's the right side I don't know how to deal with.- ajohncock
- Post #13
- Forum: Differential Equations
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Undergrad How to Isolate Variables in a System of Differential Equations?
Haha, maybe I'm not as math savvy as I thought. I guess I don't know what you mean by re-arrange it.- ajohncock
- Post #12
- Forum: Differential Equations
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Undergrad How to Isolate Variables in a System of Differential Equations?
I assume you mean to solve the equation for Dy and substitute that back into the other equation. But when I solve it for Dy I get: Dy = -Dx - 3x - 3y +2 Which is all fine and good except for the -3y. Which poses a problem when substituted back into the first equation.- ajohncock
- Post #10
- Forum: Differential Equations
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Undergrad How to Isolate Variables in a System of Differential Equations?
Haha, I wish I knew what you meant by that.- ajohncock
- Post #8
- Forum: Differential Equations
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Undergrad How to Isolate Variables in a System of Differential Equations?
The problem with this is that, the part I BOLDED is actually (D+3) in the original equation. However that may be on the right track. I tried multiplying the top by (D+3) and the bottom by D. I then added the equations and come up with this: D2x(D+3) + D(D+3)x = 2D + 3t + tD Simplified...- ajohncock
- Post #6
- Forum: Differential Equations
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Undergrad How to Isolate Variables in a System of Differential Equations?
If I do that then I get D2x + Dx + 3x - t + 3y = 2 Then I don't know how to deal with the -t + 3y Thanks for the idea though. I hadn't thought of it. Edit: After another look you could then write it as D2x + Dx + 3x = t - 3y + 2 But I still don't know what to do with it from here. I can...- ajohncock
- Post #3
- Forum: Differential Equations
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Undergrad How to Isolate Variables in a System of Differential Equations?
Hi Guys, I'm tying to solve a system of equations. I know I need to operate on the top and the bottom both in order to isolate the X's and Y's, but I can't seem to figure what to operate on them with. Here are the equations, any help is appreciated. Thanks D2x - Dy=t (D+3)x + (D+3)y=2 I...- ajohncock
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- System
- Replies: 14
- Forum: Differential Equations