document.write( "Question 687304: Please help me solve this: 3x-y=11 x+y=5 in elimination and substitution method. \n" ); document.write( "
Algebra.Com's Answer #425108 by stanbon(75887)\"\" \"About 
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3x-y=11 x+y=5 in elimination and substitution method.
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\n" ); document.write( "Elimination:\r
\n" ); document.write( "\n" ); document.write( "3x-y =11
\n" ); document.write( "x +y =5
\n" ); document.write( "-----
\n" ); document.write( "Add and solve for \"x\":
\n" ); document.write( "4x = 16
\n" ); document.write( "x = 4
\n" ); document.write( "----
\n" ); document.write( "Solve for \"y\" using x + y = 5
\n" ); document.write( "4 + y = 5
\n" ); document.write( "y = 1
\n" ); document.write( "---------
\n" ); document.write( "Substitution:
\n" ); document.write( "3x-y =11
\n" ); document.write( "x +y =5
\n" ); document.write( "-----
\n" ); document.write( "Solve the bottom equation for \"x\":
\n" ); document.write( "x = 5-y
\n" ); document.write( "Substitute into the top equation to solve for \"y\":
\n" ); document.write( "3(5-y) - y = 11
\n" ); document.write( "15 - 3y -y = 11
\n" ); document.write( "-4y = -4
\n" ); document.write( "y = 1
\n" ); document.write( "----
\n" ); document.write( "solve for \"x\" using x = 5-y
\n" ); document.write( "x = 5-1 = 4
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\n" ); document.write( "cheers,
\n" ); document.write( "Stan H.
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