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OpenStudy (anonymous):
7L of an acid solution was mixed with 3L if a 15% acid solution to make a 29% acid solution. Find the percent concentration of the first solution. Please help me & show work!
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hero (hero):
Total Liters of solution: 7 + 3 = 10 x = % concentration of 1st solution 7x + 3(.15) = 10(.29) Solve for x
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