document.write( "Question 803986: Solve the given system by the substitution method\r
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\n" ); document.write( "7x-4y=13
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Algebra.Com's Answer #484547 by Alan3354(69443)\"\" \"About 
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Solve the given system by the substitution method\r
\n" ); document.write( "\n" ); document.write( "4x+y=14
\n" ); document.write( "7x-4y=13
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\n" ); document.write( "Solve the 1st eqn for y.
\n" ); document.write( "Sub for y in the 2nd equation.
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