document.write( "Question 462805: x + 3y = 7
\n" ); document.write( "4x-5y = 96 using substitution \n" ); document.write( "

Algebra.Com's Answer #317193 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( " $\"x+%2B+3y+=+7\"$ ..........1\r
\n" ); document.write( "\n" ); document.write( " $\"4x-5y+=+96\"$ ..........2
\n" ); document.write( "-----------------------\r
\n" ); document.write( "\n" ); document.write( " $\"x+%2B+3y+=+7\"$ ..........1..solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=-+3y%2B+7\"$ .......substitute in 2\r
\n" ); document.write( "\n" ); document.write( " $\"4%283y%2B+7%29-5y+=+96\"$ .....solve for $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"12y%2B+28-5y+=+96\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"7y=+96-28\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"7y=+68\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=+68%2F7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=+9.72\"$ \r
\n" ); document.write( "\n" ); document.write( "now find $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=-+3%28+9.72%29%2B+7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=-29.16%2B+7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=-22.16\"$ \r
\n" ); document.write( "\n" ); document.write( "so, $\"x+=-22.16\"$ and $\"y=+9.72\"$
\n" ); document.write( " \r
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"x+%2B+3y+=+7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-22.16+%2B+3%289.72%29+=+7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-22.16+%2B+29.16+=+7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"7+=+7\"$ \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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