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math urgent

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2 rainstorms occurred in one week in a certain area in the first storm, 15ml of rain fell per hour, and in the second storm, 20ml of rain fell per hour. rain lasted for a total of 40 hours, resulting in a total rain of 675ml. how long was each storm.
1st storm = hours
2nd storm=hours

  • Kathy, Mandy, leeann math urgent -

    Please don't switch names.

    let length of first storm be x hrs.
    then length of second storm is 40-x hrs

    solve 15x + 20(40-x) = 675

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