document.write( "Question 66132: 3x-4y=-9
\n" ); document.write( "-x-4y=-13 \n" ); document.write( "

Algebra.Com's Answer #46859 by ptaylor(2198) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) 3x-4y=-9
\n" ); document.write( "(2) -x-4y=-13\r
\n" ); document.write( "\n" ); document.write( "We'll start by subtracting (2) from (1) and we get:\r
\n" ); document.write( "\n" ); document.write( "4x=4
\n" ); document.write( "x=1\r
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\n" ); document.write( "\n" ); document.write( "Next, we'll substitute x=1 into (1) and we have:\r
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\n" ); document.write( "\n" ); document.write( "3(1)-4y=-9
\n" ); document.write( "3-4y=-9 subtract 3 from both sides:
\n" ); document.write( "-4y=-12
\n" ); document.write( "y=3\r
\n" ); document.write( "\n" ); document.write( "CK\r
\n" ); document.write( "\n" ); document.write( "Substitute x=1 and y=3 into (1):\r
\n" ); document.write( "\n" ); document.write( "3(1)-4(3)=-9
\n" ); document.write( "-9=-9\r
\n" ); document.write( "\n" ); document.write( "Now substitute into (2)\r
\n" ); document.write( "\n" ); document.write( "-1-4(3)=-13
\n" ); document.write( "-13=-13\r
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\n" ); document.write( "\n" ); document.write( "Hope this helps----ptaylor\r
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