SOLUTION: In a mixture of concrete, there are five lb of cement mix for each pound of gravel. If the mixture contains a total of 360 lb of these two ingredients, how many pounds of gravel ar

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Question 499821: In a mixture of concrete, there are five lb of cement mix for each pound of gravel. If the mixture contains a total of 360 lb of these two ingredients, how many pounds of gravel are there?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = pounds of cement
+360+-+x+ = pounds of gravel
given:
+5%2F1+=+x%2F%28360+-+x%29+
+5%2A%28360+-+x%29+=+x+
+1800+-+5x+=+x+
+6x+=+1800+
+x+=+300+
+360+-+x+=+360+-+300+
+360+-+x+=+60+
There are 60 pounds of gravel
Check:
+5%2F1+=+x+%2F+%28360+-+x+%29+
+5%2F1+=+300%2F60+
+5%2F1+=+5%2F1+
OK