document.write( "Question 133199This question is from textbook prentice hall mathematics algebra 2
\n" ); document.write( ": please help me solve this equation:
\n" ); document.write( "one pump can fill a tank with oil in 4 hours. a second pump can fill the same tank in 3 hours. if borh pumps are used at the same time, how long will they take to fill the tank.
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Algebra.Com's Answer #97398 by vleith(2983)\"\" \"About 
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The first pump can fill 1/4 tank per hour. The second pump can fill 1/3 tank per hour.\r
\n" ); document.write( "\n" ); document.write( "The two working together can fill:
\n" ); document.write( "\"t%2F4+%2B+t%2F3\" per hour
\n" ); document.write( "\"3t%2F12+%2B+4t%2F12\"
\n" ); document.write( "\"7t%2F12\" per hour\r
\n" ); document.write( "\n" ); document.write( "In order to fill the tank, you will need to run the two pumps for \"12%2F7\" hours
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