document.write( "Question 82250: solve the system by substitution\r
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\n" ); document.write( "\n" ); document.write( "8x-4y=16
\n" ); document.write( "y=2x-4
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Algebra.Com's Answer #58919 by tutorcecilia(2152)\"\" \"About 
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y=2x-4 [substitute for the y-term in the first equation]
\n" ); document.write( "8x-4y=16
\n" ); document.write( "8x-4(2x-4)=16 [simplify]\r
\n" ); document.write( "\n" ); document.write( "8x-8x+16=16
\n" ); document.write( "0+16=16
\n" ); document.write( "16=16 [Infinate number of solutions because the equations represent the same line]\r
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