document.write( "Question 1072056: A delivery truck is transporting boxes of two sizes: large and small. The combined weight of a large box and a small box is
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\n" ); document.write( " pounds. The truck is transporting
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\n" ); document.write( "5100
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Algebra.Com's Answer #687101 by ikleyn(52790) $\"\"$ $\"About$

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document.write( "The system of equation is\r\n" );
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document.write( "  x +   y =   80,     (1)   (where x = weight of the large box . . . )\r\n" );
document.write( "70x + 50y = 5100.     (2)\r\n" );
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document.write( "Solve it by the Substitution method.\r\n" );
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document.write( "70x + 50*(80-x) = 5100.\r\n" );
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