document.write( "Question 362533: If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks?
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Algebra.Com's Answer #258421 by josmiceli(19441)\"\" \"About 
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Let 20 drinks = \"1\" task
\n" ); document.write( "Let \"x\" = the time it takes them working
\n" ); document.write( "together to mix 20 drinks or \"1\" task
\n" ); document.write( "Steven's rate of mixing = \"1%2F5\"
\n" ); document.write( "Sue's rate of mixing = \"1%2F10\"
\n" ); document.write( "Jack's rate of mixing = \"1%2F15\"
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\n" ); document.write( "Working together, their combined rate is:
\n" ); document.write( "\"1%2F5+%2B+1%2F10+%2B+1%2F15+=+1%2Fx\"
\n" ); document.write( "Multiply both sides by \"30x\"
\n" ); document.write( "\"6x+%2B+3x+%2B+2x+=+30\"
\n" ); document.write( "\"11x+=+30\"
\n" ); document.write( "\"x+=+2.73\" min
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