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Mathematics 7 Online
OpenStudy (anonymous):

NEED HELP??? Trish has a jug of contaminated water that she knows is only 75% clean. She also knows that the water will be safe to drink if she can mix it with 100% clean water so that it is 97% clean. How much clean water (100% clean) would Trish need to mix with the contaminated water in order to get 1 gallon of drinkable water?” A student used the following system of equations to model the situation given above. Which of the statements is true about the system of equations the student used? 2003-11-04-00-00_files/i0290000.jpg

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