document.write( "Question 594235: Solve this system of equations using substitution. Put your answer in ordered pair for, (x, y). x + 2y = 7 2x + y = 8 \n" ); document.write( "
Algebra.Com's Answer #376663 by mananth(16946)\"\" \"About 
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2x+y=8 .............1
\n" ); document.write( "y=8-2x
\n" ); document.write( "x+2y=7
\n" ); document.write( "Substitute y in (2)
\n" ); document.write( "x+2(8-2x)=7
\n" ); document.write( "x+16-4x =7
\n" ); document.write( "x-4x=-9
\n" ); document.write( "-3x=-9
\n" ); document.write( "/-3
\n" ); document.write( "x=3
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "2x+y=8
\n" ); document.write( "2*3+y= 8
\n" ); document.write( "6+y=8
\n" ); document.write( "y=2
\n" ); document.write( "/1
\n" ); document.write( "y=2 \r
\n" ); document.write( "\n" ); document.write( "The solution is (3,2)
\n" ); document.write( "m.ananth@hotmail.ca
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