Mathematics, 29.09.2021 21:00 jennmcd17

Grayson is trying to incorporate more exercise into his busy schedule. He has several short exercise routines he can complete at home. Last week, he worked out for a total of 70 minutes by doing 2 arm routines and 2 abdominal routines. This week, he has completed 3 arm routines and 2 abdominal routines and spent a total of 80 minutes exercising. How long does each routine last?

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