document.write( "Question 702351: -7x+y=-19
\n" ); document.write( "-2x+3y=-19 \r
\n" ); document.write( "\n" ); document.write( "-7x-8y=9
\n" ); document.write( "-4x+9y=-22\r
\n" ); document.write( "\n" ); document.write( "5x+4y=-30
\n" ); document.write( "3x-9y=-18\r
\n" ); document.write( "\n" ); document.write( "-14=-20y-7x
\n" ); document.write( "10y+4=2x \r
\n" ); document.write( "\n" ); document.write( "3+2x-y=0
\n" ); document.write( "-3-7y=10x\r
\n" ); document.write( "\n" ); document.write( "Solve by elimination \n" ); document.write( "

Algebra.Com's Answer #432924 by solver91311(24713) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "  -7x +  y = -19\r\n" );
document.write( "  -2x + 3y = -19\r\n" );
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document.write( "Multiply the first equation by -3\r\n" );
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document.write( "  21x - 3y =  57\r\n" );
document.write( " - 2x + 3y = -19\r\n" );
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document.write( "Add the two equations\r\n" );
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document.write( "  19x + 0y =  38\r\n" );
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document.write( "Solve for x\r\n" );
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document.write( "    x      =  2\r\n" );
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document.write( "Substitute the now known value of x into either original equation\r\n" );
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document.write( "-2(2) + 3y = -19\r\n" );
document.write( "        3y = -15\r\n" );
document.write( "         y = - 5\r\n" );
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document.write( "Check your work:\r\n" );
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document.write( "-2(2) + 3(-5) =  -4 - 15 = -19 -- Checks\r\n" );
document.write( "-7(2) +   -5  = -14 -  5 = -19 -- Checks\r\n" );
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document.write( "If you are wondering what happened to the other problems you posted, go back and read the instructions for posting again.\r\n" );
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\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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$\"The$

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