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OpenStudy (anonymous):
How many milliliters of 17% alcohol solution must be mixed with 40 milliliters of a 3% alcohol to obtain a 12% alcohol solution?
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OpenStudy (xapproachesinfinity):
let x be the milliliters of 17% alcohol solution let y be the total milliliters of the resulting alcohol solution then we can say that x+40=y and 0.17x+0.03*40=0.12y
OpenStudy (xapproachesinfinity):
solve for x by replacing y=x+40 in the second equation and you are done
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