<PRE><B>Question 1031365</B>
38/6=57/x
38x=342
x=342/38
x=9
-----------
 38-12=26
26/2=13
-----------------
57-18=39
39/2=19.5
------------
2*6+2*13=38
-------------
2*9+2*19.5=57</PRE>