SOLUTION: a company sells seeds in either 3-pounds or 20-pound bags.One day, the company sells 84 bags with a total weight of 660 pounds. How many 3-pound bags did the company sell? What is

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Question 1038328: a company sells seeds in either 3-pounds or 20-pound bags.One day, the company sells 84 bags with a total weight of 660 pounds. How many 3-pound bags did the company sell? What is the equation used to solve these type of problems.
Answer by Othel(27) About Me  (Show Source):
You can put this solution on YOUR website!
Let us designate the number of 3 pound bags sold as x
And let us designate the number of 20 pound bags in terms of x. Specifically, we know that 84 total bags are sold. So if 3 pound bags sold is x, then the 20 pound bags sold is equal to 84-x.
Now we add them together...
3x%2B20%2884-x%29
All of the bags sold, with their respective weights, adds up to 660 pounds. So...
3x%2B20%2884-x%29=660
Multiply...
3x%2B1680-20x=660%29
Subtracting 660 from both sides, and adding 17x to both sides, we get...
1020+=+17x
Now divide by 17, and...
60=x
Check your answer!
3%2A60%2B20%2A%2884-60%29=660?
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