document.write( "Question 1006380: The surface area of a rectangular prism is 48 square feet. The area of its front is 4 square feet and the area of one side is 10 square feet. what is the are of the top of the prism? \n" ); document.write( "
Algebra.Com's Answer #622593 by josgarithmetic(39617)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Draw the rectangular prism, at front lower left corner, x to the right, y upward, z depth. Those are the three dimensions. \r
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\n" ); document.write( "\n" ); document.write( "Front or back is xy=4, and left or right side is yz=10.\r
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\n" ); document.write( "\n" ); document.write( "Sum of sides is given area of 48.
\n" ); document.write( "2xy+2xz+2yz=48\r
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\n" ); document.write( "\n" ); document.write( "System of Equations
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