document.write( "Question 214197: Q.4: A trapezium with vertices A(t,0),B(t+2,0),C(t+2,3t+2) and D(t,2t+1), where t>0, has an area of 18 square units.Find the value of t. \n" );
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Algebra.Com's Answer #161793 by Edwin McCravy(20060)  You can put this solution on YOUR website! \r\n" );
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document.write( "The equation for the area of a trapezium (In the US, it's\r\n" );
document.write( "called a \"trapezoid\") is:\r\n" );
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document.write( " , where and \r\n" );
document.write( "are the two parallel sides, and is the perpendicular\r\n" );
document.write( "distance between them.\r\n" );
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document.write( "In this problem, , , ,\r\n" );
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document.write( "Substitute these into \r\n" );
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document.write( " , \r\n" );
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document.write( "Can you solve that equation? If not post again asking how.\r\n" );
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document.write( "When you solve it you'll get answer \r\n" );
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document.write( "Edwin \n" );
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