Mathematics, 19.07.2019 02:00 musa79

The ratio of the loudness of lala's earphones to the loudness of polina's earphones to the loudness of goffy's earphones is 6: 5: 3. if polina's earphones have a loudness of 420 decibels, find the total loudness of all three earphones.

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The ratio of the loudness of lala's earphones to the loudness of polina's earphones to the loudness...

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