A mail clerk found that the total weight of 155 packages was 815 pounds. if each of the packages weighed either 3 pounds or 8 pounds, how many of the packages weighed 8 pounds?

Question

Terrence Carpenter

Mathematics

16 December, 04:16

A mail clerk found that the total weight of 155 packages was 815 pounds. if each of the packages weighed either 3 pounds or 8 pounds, how many of the packages weighed 8 pounds?

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Answers (1)

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Skyler Cohen · Answer 1

For this on you need to set up two equations

x + y = 155 total number of packages

3x+8y=815 total weight

Then multiply both sides of the first equation by 3: 3x + 3y = 465

Then combine the two equations by subtracting the first one from the second one which gets you 5y=350 so y = 70 so we have 70 packages weighting 8 pounds.