SOLUTION: Inmixture of concrete, there are three lbs of content mix for each pound of gravel. If the mixture contains total of 184ibs of these two ingredients, how many pounds of gravel are

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Question 959079: Inmixture of concrete, there are three lbs of content mix for each pound of gravel. If the mixture contains total of 184ibs 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 +a+ = pounds of other ingredient
Let +b+ = pounds of gravel
-----------------------------
(1) +a%2Fb+=+3%2F1+
(2) +a+%2B+b+=+184+
--------------------
(1) +a+=+3b+
and
(2) +3b+%2B+b+=+184+
(2) +4b+=+184+
(2) +b+=+46+
and
(1) +a+=+3b+
(1) +a+=+138+
-----------------
There are 46 pounds of gravel
(1) +a%2Fb+=+3%2F1+
(1) +138%2F46+=+3%2F1+
(1) +3%2F1+=+3%2F1+
OK