document.write( "Question 172877: solve by the substitution method
\n" ); document.write( "9x-9y=0
\n" ); document.write( "3x=14=y
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Algebra.Com's Answer #127727 by colliefan(242)\"\" \"About 
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solve by the substitution method
\n" ); document.write( "9x-9y=0
\n" ); document.write( "3x=14=y\r
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\n" ); document.write( "\n" ); document.write( "The second equation is not correct. Check it to see which of the equal signs is correct.\r
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\n" ); document.write( "\n" ); document.write( "Solve the system by solving one equation for either x or y and then substituting that result into the other equation. Let's solve the first equation for x.\r
\n" ); document.write( "\n" ); document.write( "9x-9y=0
\n" ); document.write( "9x = 9y
\n" ); document.write( "x = y\r
\n" ); document.write( "\n" ); document.write( "In the second equation, since x = y substitute x for y and then solve that equation for x. Once you know x, substitute that value in either of the initial equations and calculate y.
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