document.write( "Question 780019: Hi I need help with problem. I keep getting an impossible answer and i can't figure out what I'm doing wrong. This is the problem: The three sides of an equilateral triangle are increase by 20 cm, 30 cm, and 40 cm, respectively. The perimeter of the resulting triangle is between twice and three times the perimeter of the original triangle. What can you conclude about the length of a side of the original triangle? \n" ); document.write( "
Algebra.Com's Answer #475449 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "let the length of a side of the original triangle be \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"Perimeter=3x\"\r
\n" ); document.write( "\n" ); document.write( "So new sides are \"x%2B20\",\"x%2B30\",\"x%2B40\", and\r
\n" ); document.write( "\n" ); document.write( "\"Perimeter=3x%2B90\"\r
\n" ); document.write( "\n" ); document.write( "The perimeter of the resulting triangle is between twice and three times the perimeter of the original triangle, or \"2%283x%29=+3x%2B90\" and \"3%283x%29=3x%2B90\"\r
\n" ); document.write( "\n" ); document.write( "So \"2%283x%29%3C=3x%2B90%3C=3%283x%29\"\r
\n" ); document.write( "\n" ); document.write( "\"6x%3C=3x%2B90%3C=9x\"\r
\n" ); document.write( "\n" ); document.write( "\"3x%3C=90%3C=6x\"\r
\n" ); document.write( "\n" ); document.write( "so \"x%3C=30\" and \"x%3E=15\"\r
\n" ); document.write( "\n" ); document.write( "So the side lengths of the original triangle are between \"15cm\" and \"30cm\", or \"15cm%3C=x%3C=30cm\".\r
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