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Mathematics 20 Online
OpenStudy (anonymous):

A mail order company charges for postage and handling according to the weight of the package. A package that weighs less than 3 pounds cost $2.00 for shipping and handling. a package that weighs 3 or more pounds ways $3.00. an order for 12 packages had a total shipping and handling cost of $29.00 find the number of packages that are $2.00 and number that are $3.00

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