document.write( "Question 1150315: For each systems of equations below, choose the best method for solving and solve.
\n" ); document.write( " y=-x-6 \r
\n" ); document.write( "\n" ); document.write( " x+3y = -18 \n" ); document.write( "

Algebra.Com's Answer #771689 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) $\"+y+=+-x+-+6+\"$
\n" ); document.write( "(2) $\"+x+%2B+3y+=+-18+\"$
\n" ); document.write( "---------------------------
\n" ); document.write( "(1) $\"+-x+-+y+=+6+\"$
\n" ); document.write( "(2) $\"+x+%2B+3y+=+-18+\"$ Add the equations
\n" ); document.write( "---------------------------
\n" ); document.write( " $\"+2y+=+-12+\"$
\n" ); document.write( " $\"+y+=+-6+\"$
\n" ); document.write( "Now plug this result back into either equation
\n" ); document.write( "(1) $\"+y+=+-x+-+6+\"$
\n" ); document.write( "(1) $\"+-6+=+-x+-+6+\"$
\n" ); document.write( "(1) $\"+x+=+0+\"$
\n" ); document.write( "-----------------------
\n" ); document.write( "check answers:
\n" ); document.write( "(1) $\"+y+=+-x+-+6+\"$
\n" ); document.write( "(1) $\"+-6+=+-0+-+6+\"$
\n" ); document.write( "(1) $\"+-6+=+-6+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+x+%2B+3y+=+-18+\"$
\n" ); document.write( "(2) $\"+0+%2B+3%2A%28-6%29+=+-18+\"$
\n" ); document.write( "(2) $\"+0+%2B+%28-18%29+=+-18+\"$
\n" ); document.write( "(2) $\"+-18+=+-18+\"$
\n" ); document.write( "OK \n" ); document.write( "

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