Mathematics, 01.06.2021 07:20, trinityrae4657

A small engineering company has an old machine which produces 30 components per hour, and has recently installed a new machine which produces 40 components per hour. Yesterday, both were in operation for different periods of time. If 545 components were produced when the total number of hours of operation was 15 hours, determine for how many hours each machine was operating. Please use system of linear equations by elimination OR substitution. I also need the work please.

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A small engineering company has an old machine which produces 30 components per hour, and has recent...