document.write( "Question 187386: 2x-3y =18 and 5x +3y =3\r
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\n" ); document.write( "\n" ); document.write( "solutions ( 3 ,4) dont understand how my book got the solution 3 need a full break down
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Algebra.Com's Answer #140459 by jojo14344(1513)\"\" \"About 
You can put this solution on YOUR website!

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\n" ); document.write( "Given\"system%282x-3y+=18+%28EQN1%29%2C5x+%2B3y+=3%28EQN2%29%29\"
\n" ); document.write( "In EQN 1 we get:
\n" ); document.write( "\"3y=2x-18\"---->\"cross%283%29y%2Fcross%283%29=%282x-18%29%2F3\"
\n" ); document.write( "\"y=%282%2F3%29x-%2818%2F3%29=%282%2F3%29x-6\" EQN 3, subst. in EQN 2:
\n" ); document.write( "\"5x%2B3%28highlight%28%282%2F3%29x-6%29%29=3\"
\n" ); document.write( "\"5x%2B%286%2F3%29x-18=3\"---->\"5x%2B2x-18=3\"---->\"7x=3%2B18=21\"--->\"cross%287%29x%2Fcross%287%29=21%2F7=3\"
\n" ); document.write( "\"red%28x=3%29\", Subst. in EQN 3:
\n" ); document.write( "\"y=%282%2Fcross%283%29%29%28cross%283%29%29-6=2-6=-4\"
\n" ); document.write( "\"red%28y=-4%29\"
\n" ); document.write( "Therefore, point of Intersection (3,-4)
\n" ); document.write( "We see graph:
\n" ); document.write( "--> RED Line (EQN 1); GREEN Line (EQN 2)
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo
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