document.write( "Question 247101: A picture frame measures 28 cm by 32 cm and is of uniform width.What is the width of the frame if the area of the picture is 192 cm^2??? \n" ); document.write( "
Algebra.Com's Answer #180333 by checkley77(12844)\"\" \"About 
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(28-2x)(32-2x)=192
\n" ); document.write( "896-64x-56x+4x^2=192
\n" ); document.write( "4x^2-120x+896-192=0
\n" ); document.write( "4x^2-120x+704=0
\n" ); document.write( "4(x^2-30x+176)=0
\n" ); document.write( "4(x-22)(x-8)=0
\n" ); document.write( "x-8=0
\n" ); document.write( "x=8 ans.
\n" ); document.write( "Proof:
\n" ); document.write( "(28-2*8)(32-2*8)=192
\n" ); document.write( "(28-16)(32-16)=192
\n" ); document.write( "12*16=192
\n" ); document.write( "192=192\r
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