SOLUTION: in conducting its daily business, a department store uses twice as many five dollar bills as ten dollar bills. $2500 was obtained in five and ten dollar bills for the days business

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Question 516067: in conducting its daily business, a department store uses twice as many five dollar bills as ten dollar bills. $2500 was obtained in five and ten dollar bills for the days business. how many five dollar bills were obtained
can you show how to set this up

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let number of $5's = 2x
Let number of $10's = x
given:
+5%2A%282x%29+%2B+10x+=+2500+
+10x+%2B+10x+=+2500+
+20x+=+2500+
+x+=+125+
+2x+=+250+
250 $5's were obtained
125 $10's were obtained
check:
+5%2A250+%2B+10%2A125+=+2500+
+1250+%2B+1250+=+2500+
+2500+=+2500+
OK