document.write( "Question 547239: Solve by the elimination method.
\n" ); document.write( "7r-3s=3
\n" ); document.write( "3r+7s=51
\n" ); document.write( "I think there is no solution but I'm not sure if I'm correct. \n" ); document.write( "

Algebra.Com's Answer #356325 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) $\"+7r+-+3s+=+3+\"$
\n" ); document.write( "(2) $\"+3r+%2B+7s+=+51+\"$
\n" ); document.write( "Multiply both sides of (1) by $\"7\"$
\n" ); document.write( "Multiply both sides of (2) by $\"3\"$
\n" ); document.write( "Then add the equations
\n" ); document.write( "(1) $\"+49r+-+21s+=+21+\"$
\n" ); document.write( "(2) $\"+9r+%2B+21s+=+153+\"$
\n" ); document.write( " $\"+58r+=+174+\"$
\n" ); document.write( " $\"+r+=+3+\"$
\n" ); document.write( "and, since
\n" ); document.write( "(1) $\"+7r+-+3s+=+3+\"$
\n" ); document.write( "(1) $\"+7%2A3+-+3s+=+3+\"$
\n" ); document.write( "(1) $\"+3s+=+21+-+3+\"$
\n" ); document.write( "(1) $\"+3s+=+18+\"$
\n" ); document.write( "(1) $\"+s+=+6+\"$
\n" ); document.write( "Check answers:
\n" ); document.write( "(2) $\"+3r+%2B+7s+=+51+\"$
\n" ); document.write( "(2) $\"+3%2A3+%2B+7%2A6+=+51+\"$
\n" ); document.write( "(2) $\"+9+%2B+42+=+51+\"$
\n" ); document.write( "(2) $\"+51+=+51+\"$
\n" ); document.write( "OK \n" ); document.write( "

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