document.write( "Question 1168915: A fruit company delivers its fruit in two types of boxes: large and small. A delivery of 12 large boxes and 2 small boxes has a total weight of 199 kilograms. A delivery of 3 large boxes and 5 small boxes has a total weight of 79 kilograms. How much does each type of box weigh? \n" ); document.write( "
Algebra.Com's Answer #793619 by Cromlix(4381)\"\" \"About 
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Hi there,
\n" ); document.write( "Make the large boxes = x
\n" ); document.write( "Small boxes = y
\n" ); document.write( "12x + 2y = 199.........(1)
\n" ); document.write( "3x + 5y = 79...........(2)
\n" ); document.write( "Multiply (2) by 4
\n" ); document.write( "12x + 2y = 199........(1)
\n" ); document.write( "12x + 20y = 316.......(2)
\n" ); document.write( "Subtract equation (1) from (2)
\n" ); document.write( "18y = 117
\n" ); document.write( "y = 6.5
\n" ); document.write( "Substitute y = 6.5 into equation (1)
\n" ); document.write( "12x + 2(6.5) = 199
\n" ); document.write( "12x + 13 = 199
\n" ); document.write( "12x = 199 - 13
\n" ); document.write( "12x = 186
\n" ); document.write( "x = 15.5
\n" ); document.write( "Large boxes weigh 15.5 kg
\n" ); document.write( "Small boxes weigh 6.5 kg.
\n" ); document.write( "Hope this helps :-)
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