document.write( "Question 201998This question is from textbook Algebra Structure and Method
\n" ); document.write( ": Solve and check by using substitutions mehtod Not sure if this is right
\n" ); document.write( "y=5x
\n" ); document.write( "2x+y=28 This is what I did y=5x y=5x
\n" ); document.write( " 2x+5x=28 y=5-4
\n" ); document.write( " 7x=28 y=1 answer is (4,1)
\n" ); document.write( " x=4\r
\n" ); document.write( "\n" ); document.write( "Also solve and check using substitution method. I get so far and am confused
\n" ); document.write( "x+3y=23
\n" ); document.write( "x=23-3y
\n" ); document.write( "3x-2y=3
\n" ); document.write( "3(23-3y) now i don't get it \n" ); document.write( "
Algebra.Com's Answer #152242 by rfer(16322)\"\" \"About 
You can put this solution on YOUR website!
most of what you have done looks ok, but just need to do a little more
\n" ); document.write( "start at
\n" ); document.write( "2x+5x=28 solve
\n" ); document.write( "7x=28
\n" ); document.write( "x=4\r
\n" ); document.write( "\n" ); document.write( "---------------------substitute 4 for x in the y=5x
\n" ); document.write( "y=5x
\n" ); document.write( "y=5(4)
\n" ); document.write( "y=20 (4,20)
\n" ); document.write( "--------------------------
\n" ); document.write( "2nd problem, starting where you stopped
\n" ); document.write( "3(23-3y)-2y=3
\n" ); document.write( "69-9y-2y=3
\n" ); document.write( "69-11y=3
\n" ); document.write( "-11y=-69+3
\n" ); document.write( "11y=69-3
\n" ); document.write( "11y=66
\n" ); document.write( "y=6
\n" ); document.write( "---------------------------
\n" ); document.write( "3x-2y=3
\n" ); document.write( "3x-2(6)=3
\n" ); document.write( "3x-12=3
\n" ); document.write( "3x=15
\n" ); document.write( "x=5 (5,6)
\n" ); document.write( "when you are working these make sure you keep track of all parts of the equations. Then just work through one step at a time. \n" ); document.write( "
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