document.write( "Question 1002707: Please help me solve this by substitution\r
\n" ); document.write( "\n" ); document.write( "x+6y=9
\n" ); document.write( "2x+5y=4
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Algebra.Com's Answer #619570 by person24(13)\"\" \"About 
You can put this solution on YOUR website!
x+6y=9
\n" ); document.write( "2x+5y=4\r
\n" ); document.write( "\n" ); document.write( "okay first get one variable by itself on the firs equation. I prefer to start with x but you can start with y if you would like. \r
\n" ); document.write( "\n" ); document.write( "x+6y=9\r
\n" ); document.write( "\n" ); document.write( "x=9-6y\r
\n" ); document.write( "\n" ); document.write( "Now you substitute x for 9-6y in the second equation...\r
\n" ); document.write( "\n" ); document.write( "2(9-6y)+5y=4\r
\n" ); document.write( "\n" ); document.write( "distribute\r
\n" ); document.write( "\n" ); document.write( "18-12y+5y=4\r
\n" ); document.write( "\n" ); document.write( "combine like terms\r
\n" ); document.write( "\n" ); document.write( "18-7y=4\r
\n" ); document.write( "\n" ); document.write( "-7y=-14\r
\n" ); document.write( "\n" ); document.write( "divide -7\r
\n" ); document.write( "\n" ); document.write( "y=2\r
\n" ); document.write( "\n" ); document.write( "woot! \r
\n" ); document.write( "\n" ); document.write( "now we need x\r
\n" ); document.write( "\n" ); document.write( "so in the first equation substitute y for 2\r
\n" ); document.write( "\n" ); document.write( "x+6y=9....\r
\n" ); document.write( "\n" ); document.write( "x+6(2)=9\r
\n" ); document.write( "\n" ); document.write( "multiply\r
\n" ); document.write( "\n" ); document.write( "x+12=9\r
\n" ); document.write( "\n" ); document.write( "subtract \r
\n" ); document.write( "\n" ); document.write( "x=-3\r
\n" ); document.write( "\n" ); document.write( "yay! \r
\n" ); document.write( "\n" ); document.write( "now check your work for x=-3 and y=2 in the first equation (or whichever you like it doesn't mater) \r
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\n" ); document.write( "\n" ); document.write( "x+6y=9\r
\n" ); document.write( "\n" ); document.write( "(-3)+6(2)=9????\r
\n" ); document.write( "\n" ); document.write( "-3+12=9???\r
\n" ); document.write( "\n" ); document.write( "9=9 :D\r
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