document.write( "Question 401059: 7x+2y=10 -7x+y=-16 \n" ); document.write( "
Algebra.Com's Answer #283807 by subudear(62)\"\" \"About 
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7x+2y=10 ...(1)
\n" ); document.write( "-7x+y=-16 ...(2)\r
\n" ); document.write( "\n" ); document.write( "from equation (2) we get
\n" ); document.write( "y = -16 + 7x\r
\n" ); document.write( "\n" ); document.write( "replace value of y into equation (1) we get
\n" ); document.write( "7x + 2(-16 + 7x) = 10
\n" ); document.write( "7x - 32 + 14x = 10
\n" ); document.write( "21x = 10 + 32
\n" ); document.write( "x = 42/21
\n" ); document.write( "x = 2\r
\n" ); document.write( "\n" ); document.write( "replace value of x in equation (1) we get
\n" ); document.write( "7(2) + 2y = 10
\n" ); document.write( "2y = 10 -14
\n" ); document.write( "y = -4/2
\n" ); document.write( "y = -2\r
\n" ); document.write( "\n" ); document.write( "so solution for both the equations is x = 2, y = -2
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