document.write( "Question 1139529: how to solve this question. Can you please help me to create equation.
\n" ); document.write( "David is thrice as heavy as timmy. patrick is 3.6 kg heavier than timmy. david is 25.8 kg heavier than patrick. find david's mass?\r
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Algebra.Com's Answer #760003 by ikleyn(52847) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "D = 3T          (1)     (\"David is thrice as heavy as timmy\")\r\n" );
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document.write( "P = T + 3.6     (2)     (\"patrick is 3.6 kg heavier than timmy\")\r\n" );
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document.write( "D = P + 25.8    (3)     (\" david is 25.8 kg heavier than patrick\")\r\n" );
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document.write( "Now substitute  D = 3T  into equation (3), based on (1).\r\n" );
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document.write( "Also, substitute P = T + 3.6  into equation (3), based on (2).\r\n" );
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document.write( "You will get then\r\n" );
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document.write( "    3T = (T+3.6) + 25.8.\r\n" );
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document.write( "Simplify and solve for T\r\n" );
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document.write( "    3T = T + (3.6 + 25.8)\r\n" );
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document.write( "    2T = 29.4\r\n" );
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document.write( "    T = 29.4/2 = 14.7.\r\n" );
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document.write( "Then from equation (1),  D = 3*14.7 = 44.1.\r\n" );
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document.write( "ANSWER.  David's mass is 44.1 kilograms.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "It can be solved by other ways, too, but this one is the simplest.\r
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\n" ); document.write( "\n" ); document.write( "It is just from sixties of the past century (i.e. more than 50 years) kilograms are not used to measure weight.\r
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\n" ); document.write( "\n" ); document.write( "Kilograms are used to measure mass,\r
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\n" ); document.write( "\n" ); document.write( "but for weight the International System of measuring units (SI) exluded kilograms as the measure of weight / force, replacing them by Newtons.\r
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