document.write( "Question 57701: Solve by substitution:
\n" ); document.write( "5x+2y=7
\n" ); document.write( "4x-y=3
\n" ); document.write( "

Algebra.Com's Answer #39498 by faceoff57(108)\"\" \"About 
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5x+2y=7 4x-y=3
\n" ); document.write( "5x+2(4x-3)=7 4x-3=y
\n" ); document.write( "5x+8x-6=7
\n" ); document.write( "13x=13 4(1)-3=y
\n" ); document.write( "x=1 4-3=y
\n" ); document.write( " 1=y
\n" ); document.write( "
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