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#### Msk2005

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if :<br />
<br />
A+B+C+D+E=24<br />
2A+B+D-2E=0<br />
D-B=A<br />
3C+D+E+2B+2A=40<br />
2E+C=19<br />
<br />
then :<br />
find A,B,C,D,E numbers<br />
<br />
have fun . I like this type of math problems

#### Chaogod87

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<div style="margin:20px; margin-top:5px; ">
<div class="smallfont" style="margin-bottom:2px">Quote:</div>
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<td class="alt2" style="border:1px inset">

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Originally Posted by <strong>Msk2005</strong>

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<div style="font-style:italic">if :<br />
<br />
A+B+C+D+E=24<br />
2A+B+D-2E=0<br />
D-B=A<br />
3C+D+E+2B+2A=40<br />
2E+C=19<br />
<br />
then :<br />
find A,B,C,D,E numbers<br />
<br />
have fun . I like this type of math problems</div>

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</div>Use Matlab...<br />
<br />
Tells you in an instant.<br />
True engineer's way =D

#### Stealth2o

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677 Posts
sorry i got lost after 3C+D+E+2B+2A=40

#### BRISKbaby

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616 Posts
<div style="margin:20px; margin-top:5px; ">
<div class="smallfont" style="margin-bottom:2px">Quote:</div>
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<td class="alt2" style="border:1px inset">

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Originally Posted by <strong>Chaogod87</strong>

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<div style="font-style:italic">Use Matlab...<br />
<br />
Tells you in an instant.<br />
True engineer's way =D</div>

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</div>See attached. Mathematica, the engineering physics major's way <img src="/images/smilies/cool.gif" border="0" alt="" title="Cool" class="inlineimg" /> <br />
<a href="http://www.overclock.net/attachment.php?s=4b5c745b70a061d0eb4ded62bba41b8f&attachmentid=33738" target="_blank" title="">Attachment 33738</a><br><a href="http://assets.overclock.net.s3.amazonaws.com/9/98/98b352ec_vbattach33738.bmp"><img src="http://www.overclock.net/image/id/616651/width/525/height/525/flags/LL"></a>

#### ThaLoveDocta

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AHH eng phys... i shoulda know you'd be the only nutters up at this time... I;m a civil!<br />
Good o'l matlab<img src="/images/smilies/biggrin.gif" border="0" alt="" title="Big Grin" class="inlineimg" /><img src="/images/smilies/biggrin.gif" border="0" alt="" title="Big Grin" class="inlineimg" /><br />
You could solve the matrix in a simple graphing calculator too! (mini mat lab)

#### rabidgnome229

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5,282 Posts
if you need work...<br />
<br />
Matrix-style<br />
[A] = [1 1 1 1 1<br />
2 1 0 1 -2<br />
-1 -1 0 1 0<br />
2 2 3 1 1<br />
0 0 1 0 2]<br />
= [A<br />
B<br />
C<br />
D<br />
E]<br />
[C]= [24<br />
0<br />
0<br />
40<br />
19]<br />
<br />
= [A]^-1[C]<br />

#### Msk2005

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Discussion Starter
<div style="margin:20px; margin-top:5px; ">
<div class="smallfont" style="margin-bottom:2px">Quote:</div>
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Originally Posted by <strong>BRISKbaby</strong>

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<div style="font-style:italic">See attached. Mathematica, the engineering physics major's way <img src="/images/smilies/cool.gif" border="0" alt="" title="Cool" class="inlineimg" /> <br />
<a href="http://www.overclock.net/attachment.php?s=4b5c745b70a061d0eb4ded62bba41b8f&attachmentid=33738" target="_blank" title="">Attachment 33738</a></div>

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</div>can you solve it yourself ? It's Very Simple . I will post the full answer Tomorrow

#### dragosmp

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7,245 Posts
or like that <img src="/images/smilies/biggrin.gif" border="0" alt="" title="Big Grin" class="inlineimg" /><br />
<br />
Solved it <img src="/images/smilies/eek.gif" border="0" alt="" title="EEK!" class="inlineimg" /><br><a href="http://assets.overclock.net.s3.amazonaws.com/c/c3/c3d995ab_vbattach33739.bmp"><img src="http://www.overclock.net/image/id/616650/width/525/height/525/flags/LL"></a>

#### Msk2005

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Discussion Starter
<div style="margin:20px; margin-top:5px; ">
<div class="smallfont" style="margin-bottom:2px">Quote:</div>
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<td class="alt2" style="border:1px inset">

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Originally Posted by <strong>dragosmp</strong>

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<div style="font-style:italic">or like that <img src="/images/smilies/biggrin.gif" border="0" alt="" title="Big Grin" class="inlineimg" /><br />
<br />
Solved it <img src="/images/smilies/eek.gif" border="0" alt="" title="EEK!" class="inlineimg" /></div>

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</div>you are wrong . 2E+C=19 ( fifth line )<br />
but with your numbers it's 89 . 70 more<br />
<br />
c doesn't equal to 2E-19 , it's 19-2E<br />
-C = 2E-19

dragosmp

#### dragosmp

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It's been too long since the last time I did some of that. Here's the good one:<br />
a-2<br />
b-4<br />
c-5<br />
d-6<br />

#### Msk2005

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it's right , but you all were very slow . I'm a 16 years old man in grade 9 and it took 10minutes for me to solve it

#### fork

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you know you are an engineer when you can do differential equationns but not long division.

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