document.write( "Question 107369: 2y-3x=18 and x+y=4 \n" ); document.write( "
Algebra.Com's Answer #78201 by blueskyy(3)\"\" \"About 
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x + y = 4\r
\n" ); document.write( "\n" ); document.write( " so, y = 4- x\r
\n" ); document.write( "\n" ); document.write( " 2y - 3x = 18\r
\n" ); document.write( "\n" ); document.write( " or 2y = 18 + 3x\r
\n" ); document.write( "\n" ); document.write( " or 2(4-x) = 18 + 3x\r
\n" ); document.write( "\n" ); document.write( " or 8 - 2x = 18 + 3x\r
\n" ); document.write( "\n" ); document.write( " or 8 - 18 = 3x + 2x\r
\n" ); document.write( "\n" ); document.write( " or -10 = 5x\r
\n" ); document.write( "\n" ); document.write( " or -2 = x\r
\n" ); document.write( "\n" ); document.write( " so, y = 4-(-2)\r
\n" ); document.write( "\n" ); document.write( " so, y = 4+2 = 6\r
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\n" ); document.write( "\n" ); document.write( "so, x= -2 ; y =6\r
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\n" ); document.write( "\n" ); document.write( " check :\r
\n" ); document.write( "\n" ); document.write( " 2y - 3x
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\n" ); document.write( " 2y = 2*6 = 12\r
\n" ); document.write( "\n" ); document.write( " 3x = 3 *(-2) = -6\r
\n" ); document.write( "\n" ); document.write( " 2y - 3x = 12 - (-6)\r
\n" ); document.write( "\n" ); document.write( " = 12 +6\r
\n" ); document.write( "\n" ); document.write( " = 18
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