document.write( "Question 140352: 9x+4y=-17
\n" ); document.write( "12y=-3-3x
\n" ); document.write( "using substition or elimination \n" ); document.write( "

Algebra.Com's Answer #102213 by ptaylor(2198) $\"\"$ $\"About$

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9x+4y=-17-----------------eq1
\n" ); document.write( "12y=-3-3x -----------------eq2\r
\n" ); document.write( "\n" ); document.write( "divide each term in eq2 by 3\r
\n" ); document.write( "\n" ); document.write( "4y=-1-x--------------------eq2a\r
\n" ); document.write( "\n" ); document.write( "Now substitute 4y=-1-x from eq2a into eq1:\r
\n" ); document.write( "\n" ); document.write( "9x-1-x=-17 add 1 to each side\r
\n" ); document.write( "\n" ); document.write( "9x-1+1-x=-17+1 collect like terms\r
\n" ); document.write( "\n" ); document.write( "8x=-16 divide each side by 8
\n" ); document.write( "x=-2--substitute this into eq2a\r
\n" ); document.write( "\n" ); document.write( "4y=-1+2=1 divide each side by 4\r
\n" ); document.write( "\n" ); document.write( "y=1/4\r
\n" ); document.write( "\n" ); document.write( "CK
\n" ); document.write( "From eq1:
\n" ); document.write( "9*(-2)+4(1/4)=-17
\n" ); document.write( "-18+1=-17
\n" ); document.write( "-17=-17
\n" ); document.write( "From eq2a
\n" ); document.write( "4(1/4)=-1+2
\n" ); document.write( "1=1\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor \n" ); document.write( "

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