document.write( "Question 824394: I need more detail solution and explanation:
\n" ); document.write( "If 3x+y-2z=7 and x-y-2z=5, find the value of 4x+2y-2z
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Algebra.Com's Answer #496442 by richwmiller(17219)\"\" \"About 
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3x+y-2z=7 ,
\n" ); document.write( "x-y-2z=5,\r
\n" ); document.write( "\n" ); document.write( "a=4x+2y-2z
\n" ); document.write( "a = 8, y = 1-x, z = x-3
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