document.write( "Question 174485This question is from textbook algebra 1
\n" ); document.write( ": you can find the perimeter of rectangle if you subtract the width from the length, add 7 inches, and multiply the result by 4.\r
\n" ); document.write( "\n" ); document.write( "d.If the rectangle width is 8 inches, what is the length? What is its perimeter? \n" ); document.write( "
Algebra.Com's Answer #129475 by nerdybill(7384)\"\" \"About 
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you can find the perimeter of rectangle if you subtract the width from the length, add 7 inches, and multiply the result by 4.
\n" ); document.write( "d.If the rectangle width is 8 inches, what is the length? What is its perimeter?
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\n" ); document.write( "Let x = length
\n" ); document.write( "and p = perimeter
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\n" ); document.write( "Because we have two variables, we'll need two equations.
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\n" ); document.write( "from the statement of the problem we get:
\n" ); document.write( "p = (x-8 + 7)4
\n" ); document.write( "from standard definition of perimeter: \"twice width plus length\"
\n" ); document.write( "p = 2(8+x)
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\n" ); document.write( "Solving for x:
\n" ); document.write( "2(8+x) = (x-8 + 7)4
\n" ); document.write( "16+2x = (x-1)4
\n" ); document.write( "16+2x = 4x-4
\n" ); document.write( "16 = 2x-4
\n" ); document.write( "20 = 2x
\n" ); document.write( "10 inches = x (length)
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\n" ); document.write( "Perimeter:
\n" ); document.write( "p = 2(8+x)
\n" ); document.write( "p = 2(8+10)
\n" ); document.write( "p = 2(18)
\n" ); document.write( "p = 36 inches (perimeter)\r
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