document.write( "Question 395915: Dont know what this is and how to do it at all. Teacher does not explain at all.\r
\n" ); document.write( "\n" ); document.write( "y=2x-9
\n" ); document.write( "x+3y=8\r
\n" ); document.write( "\n" ); document.write( "Solve each system by substitution \n" ); document.write( "
Algebra.Com's Answer #280952 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
y=2x-9
\n" ); document.write( "x+3y=8
\n" ); document.write( "Solve each system by substitution
\n" ); document.write( "-----
\n" ); document.write( "Substitute for \"y\" in the 2nd equation.
\n" ); document.write( "Then solve for \"x\":
\n" ); document.write( "----
\n" ); document.write( "x + 3(2x-9) = 8
\n" ); document.write( "---
\n" ); document.write( "x + 6x-27 = 8
\n" ); document.write( "7x = 8+27
\n" ); document.write( "----
\n" ); document.write( "7x = 35
\n" ); document.write( "---
\n" ); document.write( "x = 5
\n" ); document.write( "--------
\n" ); document.write( "Now solve for \"y\"
\n" ); document.write( "y = 2x-9
\n" ); document.write( "y = 2(5)-9
\n" ); document.write( "---
\n" ); document.write( "y = 1
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\n" ); document.write( "Solution: (5,1)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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