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OpenStudy (anonymous):
Twenty pounds of a salt-water solution contains fifteen percent salt. How much water must be added to weaken the solution to twelve percent salt?
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OpenStudy (amistre64):
20(.15) + w(0) = (20+w)(.12)
OpenStudy (amistre64):
3 = 2.4 +.12w 3 - 2.4 = .12w .6 --- = w .12 w = 60/12 = 5
OpenStudy (anonymous):
thaksnada
OpenStudy (amistre64):
yep :)
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