document.write( "Question 1135233: Jason drove for 4 hours on the freeway at the start of his trip. Then he turned onto a country road which forced him to reduce his speed by 20 miles per hour. He drove 5 more hours on this country road. If the total trip was 485 miles, what was his speed on the freeway \n" ); document.write( "
Algebra.Com's Answer #752810 by ikleyn(52830)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "        Please pay attention on how I edited your post to make the Math problem absolutely clear.\r
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document.write( "         Jason drove for 4 hours on the freeway at the start of his trip. Then he turned onto a country road \r\n" );
document.write( "         which forced him to reduce his speed by 20 miles per hour. He drove 5 \"highlight%28cross%28more%29%29\" hours \r\n" );
document.write( "         on this country road. If the total trip was 485 miles, what was his speed on the freeway ?\r\n" );
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document.write( "Let x be his speed on the freeway (the unknown under the question).\r\n" );
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document.write( "Then his speed onto the country road was (x-20) miles per hour.\r\n" );
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document.write( "The equation for the total traveled distance is\r\n" );
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document.write( "    4*x + 5*(x-20) = 485 miles.\r\n" );
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document.write( "Simplify and solve it on your own.\r\n" );
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document.write( "ANSWER.  \"%28485%2B5%2A20%29%2F9\" = 65 miles per hour.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Why did I make that editing ?\r
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\n" ); document.write( "\n" ); document.write( "Because the passage  \"He drove 5 more hours on this country road\"  can be understood as  \"(4+5) = 9 hours on this country road\".\r
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\n" ); document.write( "\n" ); document.write( "After editing this  \"paraziting\"  meaning gone out.\r
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\n" ); document.write( "\n" ); document.write( "Memorize:   Math problem formulation is correct if and only if it is absolutely clear and clean.\r
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