document.write( "Question 503220: Solve the system using substituion
\n" ); document.write( "4y+19=x
\n" ); document.write( "3y-x=-13
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Algebra.Com's Answer #339144 by Alan3354(69443)\"\" \"About 
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4y+19=x
\n" ); document.write( "3y-x=-13
\n" ); document.write( "----------
\n" ); document.write( "3y-x=-13
\n" ); document.write( "3y - (4y+19) = -13
\n" ); document.write( "-y - 19 = -13
\n" ); document.write( "etc.
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