document.write( "Question 152964: 2x=-4y -4
\n" ); document.write( "3x + 5y=-3
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Algebra.Com's Answer #112455 by jojo14344(1513) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"2x=-4y+-4\"$ ---------------------------------------> eqn 1
\n" ); document.write( " $\"3x+%2B+5y=-3\"$ --------------------------------------> eqn 2
\n" ); document.write( "In eqn 1 we get,
\n" ); document.write( " $\"x=%28-4y-4%29%2F2\"$ ------------------------------------> eqn 3
\n" ); document.write( "Substitute eqn 3 in eqn 2:
\n" ); document.write( " $\"3%28%28-4y-4%29%2F2%29%2B5y=-3\"$
\n" ); document.write( " $\"3%28%284%28-y-1%29%29%2F2%29%2B5y=-3\"$
\n" ); document.write( " $\"3%28%28cross%284%292%28-y-1%29%29%2Fcross%282%29%29%2B5y=-3\"$
\n" ); document.write( " $\"-6y-6%2B5y=-3\"$ , re-arranging
\n" ); document.write( " $\"-6%2B3=6y-5y\"$
\n" ); document.write( " $\"-3=y\"$ , SUBSTITUTE IN EQN 3 TO GET $\"x\"$
\n" ); document.write( " $\"x=%28-4%28-3%29-4%29%2F2=%2812-4%29%2F2=8%2F2\"$
\n" ); document.write( " $\"x=4\"$
\n" ); document.write( "In doubt? go back eqn 1 & 2:
\n" ); document.write( "via eqn 1: $\"2%284%29=-4%28-3%29-4\"$
\n" ); document.write( " $\"8=12-4\"$ -------------> $\"8=8\"$
\n" ); document.write( "via eqn 2: $\"3%284%29%2B5%28-3%29=-3\"$
\n" ); document.write( " $\"12-15=-3\"$ ----------> $\"-3=-3\"$
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \n" ); document.write( "

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