<PRE><B>Question 634526</B>
Let
Price of a calf = c
Price of a Sheep = s

60c+240s=17160................(1)
40c+180s=12240................(2)


Multiply (1) by 40 and (2) -60 and Add
2400c+9600s=686400
-2400c-10800s=-734400
-----------------------
-1200s=-48000
-1200s/-1200=-48000/-1200
s=40
Put the value of s in (1)
60c+240s=17160................(1)
60c+240(40)=17160
60c+9600=17160
60c=17160-9600
60c=7560
60c/60=7560/60
c=126


Price of a calf = c = $126
Price of a Sheep = s = $40</PRE>