document.write( "Question 1205740: 36x+54y=450 12x+15y=135 \n" ); document.write( "

Algebra.Com's Answer #842746 by MathLover1(20849) $\"\"$ $\"About$

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\n" ); document.write( " $\"36x%2B54y=450\"$ ......eq.1
\n" ); document.write( " $\"12x%2B15y=135\"$ .....eq.2....both sides multiply by $\"+3\"$
\n" ); document.write( "---------------------\r
\n" ); document.write( "\n" ); document.write( " $\"36x%2B54y=450\"$ ......eq.1
\n" ); document.write( " $\"36x%2B45y=405\"$ .....eq.2
\n" ); document.write( "---------------------------subtract eq.2 from eq.1\r
\n" ); document.write( "\n" ); document.write( " $\"36x%2B54y-%2836x%2B45y%29=450-405\"$
\n" ); document.write( " $\"36x%2B54y-36x-45y=45\"$
\n" ); document.write( " $\"9y=45\"$
\n" ); document.write( " $\"y=45%2F9\"$
\n" ); document.write( " $\"y=5\"$ \r
\n" ); document.write( "\n" ); document.write( "go to eq.1, substitute $\"+y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"36x%2B54%2A5=450\"$
\n" ); document.write( " $\"36x%2B270=450\"$
\n" ); document.write( " $\"36x=450-270\"$
\n" ); document.write( " $\"36x=180\"$
\n" ); document.write( " $\"x=180%2F36\"$
\n" ); document.write( " $\"x=5\"$ \r
\n" ); document.write( "\n" ); document.write( "solution:\r
\n" ); document.write( "\n" ); document.write( "ordered pair ( $\"5\"$ , $\"5\"$ )\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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