document.write( "Question 925853: If possible solve the nonlinear system of equations with Method of substitution.\r
\n" ); document.write( "\n" ); document.write( "2x-y=0
\n" ); document.write( "2xy=4\r
\n" ); document.write( "\n" ); document.write( "Please help. I got:
\n" ); document.write( "x=+-1
\n" ); document.write( "y=+-2
\n" ); document.write( "No Solution?
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #561808 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"2x-y=0\"$ ....eq.1
\n" ); document.write( " $\"2xy=4+\"$ ....eq.2
\n" ); document.write( "________________\r
\n" ); document.write( "\n" ); document.write( "start with $\"2x-y=0\"$ ....eq.1, solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x=y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=y%2F2\"$ ...substitute in eq.2\r
\n" ); document.write( "\n" ); document.write( " $\"2%28y%2F2%29y=4+\"$ ....eq.2\r
\n" ); document.write( "\n" ); document.write( " $\"cross%282%29%28y%2Fcross%282%29%29y=4+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y%2Ay=4+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y%5E2=4+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=sqrt%284%29+\"$ \r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( " $\"y=2\"$ or $\"y=-2\"$ \r
\n" ); document.write( "\n" ); document.write( "go to eq.1 or 2, substitute $\"y\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"2x-y=0\"$ ....eq.1 if $\"y=2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x-2=0\"$
\n" ); document.write( " $\"2x=2\"$
\n" ); document.write( " $\"x=2%2F2\"$
\n" ); document.write( " $\"x=1\"$ \r
\n" ); document.write( "\n" ); document.write( "or\r
\n" ); document.write( "\n" ); document.write( "if $\"y=-2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x-%28-2%29=0\"$
\n" ); document.write( " $\"2x%2B2=0\"$
\n" ); document.write( " $\"2x=-2\"$
\n" ); document.write( " $\"x=-2%2F2\"$
\n" ); document.write( " $\"x=-1\"$ \r
\n" ); document.write( "\n" ); document.write( "solutions to the system:\r
\n" ); document.write( "\n" ); document.write( " $\"x=1\"$ , $\"y=2\"$
\n" ); document.write( "or
\n" ); document.write( " $\"x=-1\"$ , $\"y=-2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x-y=0\"$ ....eq.1
\n" ); document.write( " $\"2xy=4+\"$ ....eq.2\r
\n" ); document.write( "\n" ); document.write( "

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