document.write( "Question 548420: 4x+3y=9
\n" ); document.write( "2x-y=7\r
\n" ); document.write( "\n" ); document.write( "Y=2x-7
\n" ); document.write( "4x+3+2x-7)=9
\n" ); document.write( "Solve each system by substitution
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Algebra.Com's Answer #356988 by gsmani_iyer(201)\"\" \"About 
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\"4x%2B3y=9++++.....+++......++++.....%281%29\"\r
\n" ); document.write( "\n" ); document.write( "\"2x-y=7++++++.....+++.....++++.....%282%29\"\r
\n" ); document.write( "\n" ); document.write( "From the equation (2), y=2x-7; Replacing the value of this y in Eqn.(1), we get\r
\n" ); document.write( "\n" ); document.write( "\"4x%2B3%2A%282x-7%29=9+++......++.......+++.......++....%283%29\"\r
\n" ); document.write( "\n" ); document.write( "By simplifying (3), 4x+6x-21 = 9
\n" ); document.write( " = 10x = 21+9
\n" ); document.write( " = 10x = 30
\n" ); document.write( " x = 3; (Dividing both the sides by 10)
\n" ); document.write( "Replacing the value of x by 3 in eqn.1, we get
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\n" ); document.write( " 4*3+3y = 9
\n" ); document.write( " 12-9 = -3y
\n" ); document.write( " y = \"3%2F-3+=+-1\"\r
\n" ); document.write( "\n" ); document.write( " So x=3; y=(-1) Answer.
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