document.write( "Question 955009: y=x^2-4
\n" ); document.write( "5x+y=20
\n" ); document.write( "solve by the following system of substitution \n" ); document.write( "

Algebra.Com's Answer #583329 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"5x%2B%28x%5E2-4%29=20\"$
\n" ); document.write( " $\"x%5E2%2B5x-4=20\"$
\n" ); document.write( " $\"x%5E2%2B5x-24=0\"$
\n" ); document.write( " $\"%28x%2B8%29%28x-3%29=0\"$
\n" ); document.write( "Two solutions:
\n" ); document.write( " $\"x%2B8=0\"$
\n" ); document.write( " $\"x=-8\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"y=%28-8%29%5E2-4\"$
\n" ); document.write( " $\"y=64-4\"$
\n" ); document.write( " $\"y=60\"$
\n" ); document.write( "and
\n" ); document.write( " $\"x-3=0\"$
\n" ); document.write( " $\"x=3\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"y=%283%29%5E2-4\"$
\n" ); document.write( " $\"y=9-4\"$
\n" ); document.write( " $\"y=5\"$
\n" ); document.write( "So the two solutions are (-8,60) and (3,5) \n" ); document.write( "

\n" );