document.write( "Question 1063328: the width of a rectangle is 15 cm less than 3 times the lenght if the area is 42 square cm find the dimensions of the rectangle \n" ); document.write( "

Algebra.Com's Answer #678458 by ikleyn(52802) $\"\"$ $\"About$

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\n" ); document.write( "the width of a rectangle is 15 cm less than 3 times the lenght if the area is 42 square cm find the dimensions of the rectangle
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document.write( "LW = 42,     (1)    (\"the area is 42 square cm\")\r\n" );
document.write( "W = 3L-15.   (2)    (\"the width of a rectangle is 15 cm less than 3 times the lenght\")\r\n" );
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document.write( "Substitute expression for W from (2) into the equation (1) replacing W. You will get\r\n" );
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document.write( "L*(3L - 15) = 42.\r\n" );
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document.write( "Simplify and solve for L this quadratic equation.\r\n" );
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