document.write( "Question 155078This question is from textbook algebra
\n" ); document.write( ": the sides of a rectangle have lengths 7,x, and x + 1. if the perimeter is 30, find the value of x. \n" ); document.write( "

Algebra.Com's Answer #114178 by checkley77(12844) $\"\"$ $\"About$

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7+x+x+1=30
\n" ); document.write( "2x+8=30
\n" ); document.write( "2x=30-8
\n" ); document.write( "2x=22
\n" ); document.write( "x=22/2
\n" ); document.write( "x=11 one side.
\n" ); document.write( "11+1=12 for another side.
\n" ); document.write( "Proof:
\n" ); document.write( "7+11+12=30
\n" ); document.write( "30=30 \n" ); document.write( "

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