document.write( "Question 108404:  solve the following by substitution\r
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document.write( "8x-4y=16
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document.write( "    y=2x-4\r
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document.write( "8x-4(2x-4)=16
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document.write( "8x-8x+16=16
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document.write( "      16=16\r
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document.write( "Double checking to make sure I did these right. \n" );
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Algebra.Com's Answer #79035 by jim_thompson5910(35256)    ![]() You can put this solution on YOUR website! You did the problem correctly. Since you get 16=16, this means that any x value will satisfy the equation. So there are an infinite number of solutions. \n" ); document.write( "  |