document.write( "Question 193277This question is from textbook
\n" ); document.write( ": Find the points of intersection of the graphs of the equations. [separate your answers with a semicolon]:\r
\n" ); document.write( "\n" ); document.write( "x2 + 4y2 = 100
\n" ); document.write( "x + 2y = 10 \n" ); document.write( "

Algebra.Com's Answer #145099 by RAY100(1637) $\"\"$ $\"About$

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solving
\n" ); document.write( "1) x+4y=100
\n" ); document.write( "2)x+2y=10
\n" ); document.write( "subst (1)-(2)
\n" ); document.write( "2y=90
\n" ); document.write( "y=45
\n" ); document.write( "subst in (2)
\n" ); document.write( "x+2(45)=10
\n" ); document.write( "x+90=10
\n" ); document.write( "x=-80
\n" ); document.write( "check
\n" ); document.write( "(1) (-80)+4(45)=-80+180=100,,,ok
\n" ); document.write( "(2) (-80)+2(45)=-80+90=10,,,ok \n" ); document.write( "

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