Question 1043382
<font face="Times New Roman" size="+2">


Technically, there is no specific answer to your problem.  That is because you have 5 variables and only 4 equations.  *[tex \Large A] is not now, never has been, and never will be the same thing as *[tex \Large a].  However, presuming that you were simply being sloppy...
<pre>
a + b = 8  =>  a = 8 - b
b + d = 8  =>  d = 8 - b, so the first thing we know is that a = d

a + c = 13 =>  a = 13 - c
c - d = 6  =>  d = c - 6
but since a = d
c - 6 = 13 - c  =>  2c = 19 =>  c = 9.5
</pre>
You should be able to finish it yourself from here.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  

</font>