document.write( "Question 151047: Use the Substitution method to solve the system of equations. \r
\n" ); document.write( "\n" ); document.write( "y - 2x = -5
\n" ); document.write( "3y - x = 5 \n" ); document.write( "
Algebra.Com's Answer #110950 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
3x + y = 5
\n" ); document.write( "y=-3x+5
\n" ); document.write( "now replace y with(-3x+5) for x in the other equation & solve for x.
\n" ); document.write( "4x - 7y = -10
\n" ); document.write( "4x-7(-3x+5)=-10
\n" ); document.write( "4x+21x-35=-10
\n" ); document.write( "25x=-10+35
\n" ); document.write( "25x=25
\n" ); document.write( "x=25/25
\n" ); document.write( "x=1 answer.
\n" ); document.write( "y=-3*1+5
\n" ); document.write( "y=-3+5
\n" ); document.write( "y=2 answer.
\n" ); document.write( "proof
\n" ); document.write( "4*1-7*2=-10
\n" ); document.write( "4-14=-10
\n" ); document.write( "-10=-10\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );