document.write( "Question 491998: 2x + 8y = 80
\n" ); document.write( "-2x + 2y = 0 \n" ); document.write( "

Algebra.Com's Answer #334891 by deborabr(181) $\"\"$ $\"About$

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suming the two equations
\n" ); document.write( "2x + 8y = 80
\n" ); document.write( "-2x + 2y = 0
\n" ); document.write( "______________
\n" ); document.write( "0x + 10y = 80
\n" ); document.write( "y = 80/10
\n" ); document.write( "y = 8
\n" ); document.write( "substituting y to find x\r
\n" ); document.write( "\n" ); document.write( "-2x + 2*8 = 0
\n" ); document.write( "-2x + 16 = 0
\n" ); document.write( "-2x = -16 multiplying by -1 to change the signal
\n" ); document.write( "2x = 16
\n" ); document.write( "x = 16/2
\n" ); document.write( "x = 8 \n" ); document.write( "

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