document.write( "Question 157338: I cannot seem to figure this one out, I've figure all 5 problems before hand on my assignment but can't seem to get this one, and it looks so simple, can anyone help\r
\n" ); document.write( "\n" ); document.write( "18X + Y = 42, 6X - 3Y = -6 \n" ); document.write( "

Algebra.Com's Answer #115957 by jojo14344(1513) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"18X+%2B+Y+=+42\"$ ---------> eqn 1, $\"6X+-+3Y+=+-6\"$ -----------> eqn 2
\n" ); document.write( "In eqn 1 we get,
\n" ); document.write( " $\"Y=42-18X\"$ ----------> eqn 3
\n" ); document.write( "Susbtitute eqn 3 in eqn 2:
\n" ); document.write( " $\"6X-3%2842-18X%29=-6\"$
\n" ); document.write( " $\"6X-126%2B54X=-6\"$ , combine similar terms
\n" ); document.write( " $\"6X%2B54X=-6%2B126\"$
\n" ); document.write( " $\"60X=120\"$ ----> $\"cross%2860%29X%2Fcross%2860%29=cross%28120%292%2Fcross%2860%29\"$
\n" ); document.write( " $\"X=2\"$
\n" ); document.write( "For $\"Y\"$ go back eqn 3:
\n" ); document.write( " $\"Y=42-18%2A2=42-36=6\"$
\n" ); document.write( "In doubt? go back eqn 1:
\n" ); document.write( " $\"18%2A2%2B6=42\"$
\n" ); document.write( " $\"36%2B6=42\"$
\n" ); document.write( " $\"42=42\"$
\n" ); document.write( "Also via eqn 2:
\n" ); document.write( " $\"6%2A2-3%2A6=-6\"$
\n" ); document.write( " $\"12-18=-6\"$
\n" ); document.write( " $\"-6=-6\"$
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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