document.write( "Question 73697: y=2x=1
\n" ); document.write( "y=-3x-4 \n" ); document.write( "
Algebra.Com's Answer #52765 by checkley75(3666)\"\" \"About 
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IF THE EQUATION IS Y=2X+1 THEN WE SUBSTITUTE (2X+1) FOR Y IN THE OTHER EQUATION & SOLVE FOR X.
\n" ); document.write( "2X+1=-3X-4
\n" ); document.write( "2X+3X=-4-1
\n" ); document.write( "5X=-5
\n" ); document.write( "X=-5/5
\n" ); document.write( "X=-1 ANSWER. NOW SUBSTITUTE -1 FOR X & SOLVE FOR Y
\n" ); document.write( "Y=2*-1+1
\n" ); document.write( "Y=-2+1
\n" ); document.write( "Y=-1
\n" ); document.write( "PROOF
\n" ); document.write( "-1=-3*-1-4
\n" ); document.write( "-1=3-4
\n" ); document.write( "-1=-1\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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