document.write( "Question 999071: i need help with this problem please:
\n" ); document.write( "4x+4y=8
\n" ); document.write( "2x+y=2
\n" ); document.write( "another elimation/addition systems of equations problem.
\n" ); document.write( "i just dont know what to multiply to the first equation to make the variables. im having issues with that. help. \n" ); document.write( "

Algebra.Com's Answer #616745 by ikleyn(52786) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "4x + 4y = 8   (1)\r\n" );
document.write( "2x +  y = 2   (2)\r\n" );
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document.write( "Multiply the equation (2) by 2 (both sides). You will get\r\n" );
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document.write( "4x + 4y = 8   (1')\r\n" );
document.write( "4x + 2y = 4   (2')\r\n" );
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document.write( "Distract (2') from (1') (both sides). You will get\r\n" );
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document.write( "(4x - 4x) + (4y - 2y) = 8 - 4, or\r\n" );
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document.write( "0*x + 2y = 4, or\r\n" );
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document.write( "2y = 4.\r\n" );
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document.write( "Hence, y =  = 2.\r\n" );
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document.write( "Now you can easily find x from 4x + 4y = 8. \r\n" );
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document.write( "Namely, 4x = 8 - 4y = 8 - 4*2 = 0, hence, x = 0.\r\n" );
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document.write( "Answer. x=0, y=2\r\n" );
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