document.write( "Question 849778: The perimeter of a triangle is 51 cm. The longest side is twice the length of the shortest side. The third side is 3 cm longer than the shortest side. How long is each side? How do i write an equation that represents the problem and then solve it? \n" ); document.write( "
Algebra.Com's Answer #511734 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Assign variables to everything and then use the description to refine what those variables are.\r
\n" ); document.write( "\n" ); document.write( "p = perimeter and p=51.\r
\n" ); document.write( "\n" ); document.write( "x, y, z are the sides of the triangle.
\n" ); document.write( "x = shortest
\n" ); document.write( "y = medium
\n" ); document.write( "z = longest
\n" ); document.write( "-
\n" ); document.write( "z=2x.
\n" ); document.write( "y=x+3.
\n" ); document.write( "Notice how y and z both are in terms of x. What then have you for x, y, z?
\n" ); document.write( "-
\n" ); document.write( "x = shortest side
\n" ); document.write( "x+3 = medium side
\n" ); document.write( "2x = longest side\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Meaning of perimeter means you have (x)+(x+3)+(2x)=p
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