SOLUTION: A pharmacist has two vitamin-supplement powders. The first powder is 20% vitamin B1 and 30% vitamin B2. The second is 15% vitamin B1 and 10% vitamin B2. How many milligrams of each

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Question 1169907: A pharmacist has two vitamin-supplement powders. The first powder is 20% vitamin B1 and 30% vitamin B2. The second is 15% vitamin B1 and 10% vitamin B2. How many milligrams of each powder should the pharmacist use to make a mixture that contains 130 mg of vitamin B1 and 180 mg of vitamin B2?
Answer by josgarithmetic(39623)   (Show Source): You can put this solution on YOUR website!
                          %B1     qty B1         %B2      qty B2

first powder    x          20      0.2x          30        0.3x

second powder   y          15     0.15y          10        0.1y

total(mg's)                       130                     180

-----simplify and solve this system.
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