document.write( "Question 175287: Sheila has a picture frame that measures 20cm by 30cm. If she puts a mat inside the frame that decreases the picture area by 264cm2, how wide is the mat? \n" ); document.write( "
Algebra.Com's Answer #130768 by checkley75(3666)\"\" \"About 
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20*30=600cm^2 is the picture area.
\n" ); document.write( "600-264=336
\n" ); document.write( "2x*3x=336
\n" ); document.write( "6x^2=336
\n" ); document.write( "x^2=336/6
\n" ); document.write( "x^2=56
\n" ); document.write( "x=sqrt56
\n" ); document.write( "x=7.48
\n" ); document.write( "2*7.48=14.96 for one dimention.
\n" ); document.write( "3*7.48=22.44 for the other dimention.
\n" ); document.write( "Proof:
\n" ); document.write( "14.96*22.44=336
\n" ); document.write( "336~336
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