document.write( "Question 952717: A manufacturing plant produces fixed size square and circular metal panels.
\n" ); document.write( "The mass of a square panel is 13kg and that of a circular panel is 22 kg.
\n" ); document.write( "Use algebraic techniques to find how many of each panel there are in a truck
\n" ); document.write( "loaded with 65 panels of total mass 1205 kg. \r
\n" ); document.write( "\n" ); document.write( "I know the answers are 13kg=25 and 22kg=40
\n" ); document.write( "but i am struggling with how to use algebraic techniques, please help me understand?!?!
\n" ); document.write( "

Algebra.Com's Answer #581795 by rothauserc(4718)\"\" \"About 
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Let x be the number of 13kg panels and y be the number of 22kg panels, then
\n" ); document.write( "x + y = 65
\n" ); document.write( "(x*13) + (y*22) = 1205
\n" ); document.write( "solve for x in first equation
\n" ); document.write( "x = 65 - y
\n" ); document.write( "(65-y)*13 + (y*22) = 1205
\n" ); document.write( "845 -13y + 22y = 1205
\n" ); document.write( "9y = 360
\n" ); document.write( "y = 40 and
\n" ); document.write( "x = 25
\n" ); document.write( "therefore
\n" ); document.write( "there are 25 13kg panels and 40 22kg panels
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