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 #43163 by jai_kos(139)\"\" \"About 
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Consider equation(1), we get\r
\n" ); document.write( "\n" ); document.write( "2x - 3y = 0\r
\n" ); document.write( "\n" ); document.write( "2x = 3y \r
\n" ); document.write( "\n" ); document.write( "x = 3y / 2 --->(3)\r
\n" ); document.write( "\n" ); document.write( "Substitute equation(3) in equation (2), we get\r
\n" ); document.write( "\n" ); document.write( "3 (3y / 2) + 2y = 13\r
\n" ); document.write( "\n" ); document.write( "9y / 2 + 2y = 13\r
\n" ); document.write( "\n" ); document.write( "Mulitply by 2 throughout,we get\r
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\n" ); document.write( "\n" ); document.write( "9y + 4y = 13 * 2\r
\n" ); document.write( "\n" ); document.write( "13 y = 13 * 2\r
\n" ); document.write( "\n" ); document.write( "y = 13 * 2 / 13\r
\n" ); document.write( "\n" ); document.write( "y = 2 --->(4)\r
\n" ); document.write( "\n" ); document.write( "Now substitue equation(4) in equation(3), we get\r
\n" ); document.write( "\n" ); document.write( "x = 3 * 2 / 2 = 3 --->(5)\r
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\n" ); document.write( "\n" ); document.write( "Add equation (4) and eqaution(5)\r
\n" ); document.write( "\n" ); document.write( "We get x + y = 3 + 2 = 5\r
\n" ); document.write( "\n" ); document.write( "x +y = 5 \n" ); document.write( "
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