document.write( "Question 62413: If 2x - 3y = 0 and 3x + 2y = 13, find x + y. Do I solve for x and y and then just add them. Please show me. \n" ); document.write( "
Algebra.Com's Answer #43162 by 303795(602)\"\" \"About 
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Yes your idea is correct.\r
\n" ); document.write( "\n" ); document.write( "Equation 1 : 2x - 3y = 0
\n" ); document.write( "Equation 2 : 3x + 2y = 13\r
\n" ); document.write( "\n" ); document.write( "Multiply the first equation by 2 and the second equation by 3. This will give a -6y in the first equation and a 6y in the second equation which can easily be eliminated.\r
\n" ); document.write( "\n" ); document.write( "New Equation 1 : 4x - 6y = 0
\n" ); document.write( "New Equation 2 : 9x + 6y = 39\r
\n" ); document.write( "\n" ); document.write( "Add the two equations together to get
\n" ); document.write( "13x = 39\r
\n" ); document.write( "\n" ); document.write( "Obviously x must be 3. Substitute x=3 into one of the two equations.
\n" ); document.write( "2*3 - 3y = 0
\n" ); document.write( "6=3y ie y must be 2
\n" ); document.write( "Therefore x + y = 3 + 2 = 5
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