document.write( "Question 286491: 1.I takes Jose 6 hours to change the breaks on his car. His wife Betty can do the breaks in 8 hours. How long would it take them if they work together?\r
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Algebra.Com's Answer #207795 by Edwin McCravy(20086)\"\" \"About 
You can put this solution on YOUR website!
1.I takes Jose 6 hours to change the breaks on his car. His wife Betty can do the breaks in 8 hours. How long would it take them if they work together?
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document.write( "Make this chart, putting in 1 for the no of jobs done,\r\n" );
document.write( "the given times to do the job and the unknown x for \r\n" );
document.write( "the quantity that was asked for, namely the time it\r\n" );
document.write( "would take both together: \r\n" );
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document.write( "             Number of       Rate in       Time in \r\n" );
document.write( "             Jobs Done      Jobs/hour       hours\r\n" );
document.write( "Jose alone        1                            6\r\n" );
document.write( "Betty alone       1                            8\r\n" );
document.write( "both together     1                            x\r\n" );
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document.write( "Now use the formula\r\n" );
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document.write( "\"Rate_in_Jobs_per_hour+=+%28Number_of_jobs_done%29%2F%28Time%29\"\r\n" );
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document.write( "to fill in the three rates:\r\n" );
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document.write( "             Number of       Rate in       Time in \r\n" );
document.write( "             Jobs Done      Jobs/hour       hours\r\n" );
document.write( "Jose alone        1            1/6             6\r\n" );
document.write( "Betty alone       1            1/8             8\r\n" );
document.write( "both together     1            1/x             x\r\n" );
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document.write( "Now to set up the equation, we use:\r\n" );
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document.write( "\"%22Jose%27s_rate%22\"\"%22%22%2B%22%22\"\"%22Betty%27s_rate%22\"\"%22%22=%22%22\"\"%22Rate_together%22\" \r\n" );
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document.write( "\"1%2F6%2B1%2F8=1%2Fx\"\r\n" );
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document.write( "Can you solve that for x?  If not post again asking how.\r\n" );
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document.write( "Answer \"x=24%2F7=3%263%2F7\" hours.\r\n" );
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document.write( "Edwin
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