document.write( "Question 546936: -3x-4y=27
\n" ); document.write( "5x-6y=-7 \n" ); document.write( "

Algebra.Com's Answer #356161 by Maths68(1474) $\"\"$ $\"About$

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$\"-3x-4y=27\"$ ..............(1)
\n" ); document.write( " $\"5x-6y=-7\"$ ...............(2)\r
\n" ); document.write( "\n" ); document.write( "Multiply (1) by 5 and (2) by 3 and add both equations
\n" ); document.write( " $\"-15x-20y=135\"$
\n" ); document.write( " $\"15x-18y=-21\"$
\n" ); document.write( "----------------------
\n" ); document.write( " $\"-38y=114\"$
\n" ); document.write( " $\"-38y%2F-38=114%2F-38\"$
\n" ); document.write( " $\"y=-3\"$
\n" ); document.write( "Put the value of y in (1)
\n" ); document.write( " $\"-3x-4%28-3%29=27\"$
\n" ); document.write( " $\"-3x%2B12=27\"$
\n" ); document.write( " $\"-3x=27-12\"$
\n" ); document.write( " $\"-3x=15\"$
\n" ); document.write( " $\"-3x%2F-3=15%2F-3\"$
\n" ); document.write( " $\"x=-5\"$ \r
\n" ); document.write( "\n" ); document.write( "(x,y)=(-5,-3)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Check
\n" ); document.write( "=====
\n" ); document.write( "Put the value of x and y in (1)
\n" ); document.write( " $\"-3x-4y=27\"$ ..............(1)
\n" ); document.write( " $\"-3%28-5%29-4%28-3%29=27\"$
\n" ); document.write( " $\"15%2B12=27\"$
\n" ); document.write( " $\"27=27\"$ \r
\n" ); document.write( "\n" ); document.write( "Put the value of x and y in (2)
\n" ); document.write( " $\"5%28-5%29-6%28-3%29=-7\"$
\n" ); document.write( " $\"-25%2B18=-7\"$
\n" ); document.write( " $\"-7=-7\"$
\n" ); document.write( " \n" ); document.write( "

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