document.write( "Question 299693: x + 3y = 7
\n" ); document.write( "-x + 4y = 7 \n" ); document.write( "

Algebra.Com's Answer #215282 by checkley77(12844) $\"\"$ $\"About$

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x + 3y = 7
\n" ); document.write( "-x + 4y = 7 add
\n" ); document.write( "-----------------
\n" ); document.write( "7y=14
\n" ); document.write( "y=14/7
\n" ); document.write( "y=2 ans.
\n" ); document.write( "x+3*2=7
\n" ); document.write( "x+6=7
\n" ); document.write( "x=7-6
\n" ); document.write( "x=1 ans.
\n" ); document.write( "Proof:
\n" ); document.write( "-1+4*2=7
\n" ); document.write( "-1+8=7
\n" ); document.write( "7=7 \n" ); document.write( "

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