document.write( "Question 392848: i need you to help me with substitution, i dont get it \n" ); document.write( "
Algebra.Com's Answer #278907 by checkley79(3341)\"\" \"About 
You can put this solution on YOUR website!
x+y=15 or x=15-y
\n" ); document.write( "x*y=50
\n" ); document.write( "Now substitute (15-y) for x in the second equation & solve for y
\n" ); document.write( "(15-y)y=50
\n" ); document.write( "15y-y^2=50
\n" ); document.write( "y^2-15y+50=0
\n" ); document.write( "(x-10)(x-5)=0
\n" ); document.write( "x-10=0
\n" ); document.write( "x=10 ans.
\n" ); document.write( "10+y=15
\n" ); document.write( "y=15-10
\n" ); document.write( "y=5 ans.
\n" ); document.write( "----------
\n" ); document.write( "x-5=0
\n" ); document.write( "x=5 ans.
\n" ); document.write( "5+y=15
\n" ); document.write( "y=15-5
\n" ); document.write( "y=10 ans. \n" ); document.write( "
\n" );