document.write( "Question 119687: it is about matrices and determinants i need to find the value of x in the system of equations 2x+y -4 =0;3x +(5/2)y-10=0 using cramers rule. \n" ); document.write( "

Algebra.Com's Answer #87706 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"2x%2By-4=0\"$
\n" ); document.write( " $\"3x%2B%285%2F2%29y-10=0\"$
\n" ); document.write( "or changing the equations, you get,
\n" ); document.write( " $\"2x%2By=4\"$
\n" ); document.write( " $\"3x%2B%285%2F2%29y=10\"$
\n" ); document.write( "or in matrix form
\n" ); document.write( "

\n" ); document.write( "According to Cramer's rule, then
\n" ); document.write( "

\n" ); document.write( "

\n" ); document.write( " $\"abs%28matrix%282%2C2%2C4%2C1%2C10%2C5%2F2%29%29=4%285%2F2%29-1%2810%29=0\"$
\n" ); document.write( " $\"abs%28matrix%282%2C2%2C2%2C4%2C3%2C10%29%29=2%2810%29-4%283%29=8\"$
\n" ); document.write( " $\"abs%28matrix%282%2C2%2C2%2C1%2C3%2C5%2F2%29%29=2%285%2F2%29-3%281%29=2\"$
\n" ); document.write( " $\"x=0%2F2=0\"$
\n" ); document.write( " $\"y=8%2F2=4\"$
\n" ); document.write( "Check your answers.
\n" ); document.write( " $\"2x%2By-4=0\"$
\n" ); document.write( " $\"2%280%29%2B4-4=0\"$
\n" ); document.write( " $\"0=0\"$
\n" ); document.write( "True statement.
\n" ); document.write( " $\"3x%2B%285%2F2%29y-10=0\"$
\n" ); document.write( " $\"3%280%29%2B%285%2F2%29%284%29-10=0\"$
\n" ); document.write( " $\"10-10=0\"$
\n" ); document.write( " $\"0=0\"$
\n" ); document.write( "True statement.
\n" ); document.write( "Good asnwers. \n" ); document.write( "

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