document.write( "Question 179282: Matt makes a cardboard frame to go around the edges of an 8cm * 10cm photograph. The frame has an area of 63 square centimeters and is of equal width all the way around. What is the width? \n" ); document.write( "
Algebra.Com's Answer #134383 by edjones(8007)![]() ![]() You can put this solution on YOUR website! L*w=A \n" ); document.write( "10*8=80 \n" ); document.write( "Let x be the increase in length or width in the frame compared to the picture. \n" ); document.write( "(x+10)(x+8)=63+80 \n" ); document.write( "x^2+18x+80=143 \n" ); document.write( "x^2+18x-63=0 \n" ); document.write( "(x+21)(x-3)=0 \n" ); document.write( "x=3 \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |