document.write( "Question 281111: an artist makes three types of ceramic statues at a monthly cost of $650 for 180 statues. The manufacturing costs for the three types are $5,$4, and $3. If the statues sell for $20,$12, and $9,respectively, how many of each type should be made to produce $2,100 in monthly revenue? \n" ); document.write( "
Algebra.Com's Answer #204214 by richwmiller(17219)\"\" \"About 
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\n" ); document.write( "we have three unknowns and so need three equations
\n" ); document.write( "for costs
\n" ); document.write( "x+y+z=180
\n" ); document.write( "5x+4y+3z=650
\n" ); document.write( "for revenue
\n" ); document.write( "20x+12y+9z=2100
\n" ); document.write( "x+y+z=180
\n" ); document.write( "5x+4y+3z=650
\n" ); document.write( "x=30
\n" ); document.write( "y=50
\n" ); document.write( "z=100\r
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