document.write( "Question 461175: find the solution of the following system of linear equations:
\n" ); document.write( "3x+y=8
\n" ); document.write( "-2x+y=-7 \n" ); document.write( "

Algebra.Com's Answer #316326 by mananth(16946) $\"\"$ $\"About$

You can put this solution on YOUR website!
3 x + 1 y = 8 .............1
\n" ); document.write( "-2 x + 1 y = -7 .............2
\n" ); document.write( "Multiply (2) by -1
\n" ); document.write( "3 x + 1 y = 8
\n" ); document.write( "2 x + -1 y = 7
\n" ); document.write( "Add the two equations
\n" ); document.write( "5 x = 15
\n" ); document.write( "/ 5
\n" ); document.write( "x = 3
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "3 x + 1 y = 8
\n" ); document.write( "9 + 1 y = 8
\n" ); document.write( " 1 y = 8 -9
\n" ); document.write( " 1 y = -1
\n" ); document.write( " y = -1
\n" ); document.write( " \n" ); document.write( "

\n" );