document.write( "Question 995930: How far can a man drive into a country if he drives out at 40 miles per hour, returns over the same road at 30 miles per hour, and spends 8 hours away from home, including a 1-hour stop for lunch? \n" ); document.write( "
Algebra.Com's Answer #614578 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
Eight hours away from home and 1 hour for lunch means total time traveling, 7 hours.\r
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\n" ); document.write( "\n" ); document.write( "Let variables' meaning be implied in this table.
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document.write( "                speed    time    distance\r\n" );
document.write( "TO COUNTRY      40        c      40c\r\n" );
document.write( "TO HOME         30        h      30h\r\n" );
document.write( "Total                     7                         \r\n" );
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This does not help.\r\n" );
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document.write( "Distance each way should be the same, some number d.\r\n" );
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document.write( "               speed   time       distance\r\n" );
document.write( "TO COUNTRY      40      d/40       d\r\n" );
document.write( "TO HOME         30      d/30       d\r\n" );
document.write( "Total                   7\r\n" );
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\n" ); document.write( "This is more useful.
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\n" ); document.write( "\"highlight%28d%2F40%2Bd%2F30=7%29\"
\n" ); document.write( "Solve for d. \n" ); document.write( "
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