document.write( "Question 181450This question is from textbook Algebra & trigonometry blitzer
\n" ); document.write( ": as written on my homework = \r
\n" ); document.write( "\n" ); document.write( "solve the system : \r
\n" ); document.write( "\n" ); document.write( "4x-7/2y=-18
\n" ); document.write( "7/2x-3y=-31/2 \n" ); document.write( "

Algebra.Com's Answer #136062 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) $\"4x+-+%287%2F2%29y+=+-18\"$
\n" ); document.write( "(2) $\"%287%2F2%29x+-+3y+=+-%2831%2F2%29\"$
\n" ); document.write( "Multiply both sides of (2) by $\"8%2F7\"$
\n" ); document.write( "(2) $\"%288%2F7%29%287%2F2%29%2Ax+-+%288%2F7%29%2A3y+=+-%288%2F7%29%2831%2F2%29\"$
\n" ); document.write( "(2) $\"4x+-+%2824%2F7%29y+=+-%28124%2F7%29\"$
\n" ); document.write( "Subtract (1) from (2)
\n" ); document.write( "(2) $\"4x+-+%2824%2F7%29y+=+-%28124%2F7%29\"$
\n" ); document.write( "(1) $\"-4x+%2B+%287%2F2%29y+=+126%2F7\"$
\n" ); document.write( " $\"%2849%2F14+-+48%2F14%29%2Ay+=+2%2F7\"$
\n" ); document.write( " $\"%281%2F14%29%2Ay+=+2%2F7\"$
\n" ); document.write( " $\"y+=+4\"$
\n" ); document.write( "Plug this back into (1)
\n" ); document.write( "(1) $\"4x+-+%287%2F2%29y+=+-18\"$
\n" ); document.write( "(1) $\"4x+-+%287%2F2%29%2A4+=+-18\"$
\n" ); document.write( " $\"4x+=+-18+%2B+14\"$
\n" ); document.write( " $\"4x+=+-4\"$
\n" ); document.write( " $\"x+=+-1\"$
\n" ); document.write( "The solutions are $\"x+=+-1\"$ and $\"y+=+4\"$
\n" ); document.write( " \n" ); document.write( "

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