SOLUTION: Chang's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Chang $4.10 per pound, and type B coffee costs $5.20 per pound. This month's blend

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Question 1021100: Chang's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Chang $4.10
per pound, and type B coffee costs $5.20
per pound. This month's blend used three times as many pounds of type B coffee as type A, for a total cost of $689.50 were used?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +a+ = pounds of type A coffee used
+3a+ = pounds of type B cofee
----------------------------
++4.1a+%2B+5.2%2A3a+=+689.5+
+4.1a+%2B+15.6a+=+689.5+
+19.7a+=+689.5+
+a+=+35+
and
+3a+=+105+
-------------
35 pounds of type A coffee are used
105 pounds of type B cofee are used