document.write( "Question 334794: use two different methods to find where the following two lines intersect
\n" ); document.write( "y=x+8, y=-3x+4 \n" ); document.write( "
Algebra.Com's Answer #239886 by mananth(16946)\"\" \"About 
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y=x+8,
\n" ); document.write( "y=-3x+4
\n" ); document.write( "elimination method
\n" ); document.write( "subtract the equations
\n" ); document.write( "y-y= x+8-(-3x+4)
\n" ); document.write( "0=x+8+3x-4
\n" ); document.write( "0=4x+4
\n" ); document.write( "add -4
\n" ); document.write( "-4=4x+4-4
\n" ); document.write( "-4=4x
\n" ); document.write( "divide by 4
\n" ); document.write( "x=-1
\n" ); document.write( "..
\n" ); document.write( "plug value of x in first equation
\n" ); document.write( "y=-1+8
\n" ); document.write( "y=7
\n" ); document.write( "...
\n" ); document.write( "substitution method
\n" ); document.write( "y=x+8,
\n" ); document.write( "y=-3x+4 \r
\n" ); document.write( "\n" ); document.write( "plug value of y in second equation
\n" ); document.write( "x+8=-3x+4
\n" ); document.write( "reorder the equation
\n" ); document.write( "4x=-4
\n" ); document.write( "x=-1
\n" ); document.write( "..
\n" ); document.write( "plug value of x in the equation
\n" ); document.write( "y=-1+8
\n" ); document.write( "y=7 \n" ); document.write( "
\n" );