<PRE><B>Question 520934</B>
There is an equal number of two brands of watches on a shelf. Brand A watches cost $58 each and brand B watches cost $30 each. If the total cost of all watches on the shelf is $22,000 how many watches are there?
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let x=total number of watches
x/2*58=x/2*30=22000
58x/2+30x/2=22000
58x+30x=44000
88x=44000
x=44000/88=500
Ans:
Number of watches on the shelf=500</PRE>