document.write( "Question 1080451: Find the solutions to the following systems of equations:
\n" ); document.write( "(a){x^2+y^2= 100
\n" ); document.write( " y−x= 2
\n" ); document.write( "(b){y−log base9(x+ 1) = 0
\n" ); document.write( " y−log base9(x) = 1/2.
\n" ); document.write( "

Algebra.Com's Answer #694569 by stanbon(75887)\"\" \"About 
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Find the solutions to the following systems of equations:
\n" ); document.write( "(a){x^2+y^2= 100
\n" ); document.write( "y−x= 2
\n" ); document.write( "----
\n" ); document.write( "x^2 + (x+2)^2 = 100
\n" ); document.write( "x^2 + x^2 + 4x -96 = 0
\n" ); document.write( "x^2 + 2x - 48 = 0
\n" ); document.write( "x = 6 or x = -8
\n" ); document.write( "If x = 6, y = -9
\n" ); document.write( "If x = -8, y =
\n" ); document.write( "---------------------------
\n" ); document.write( "(b){y−log base9(x+ 1) = 0
\n" ); document.write( "y−log base9(x) = 1/2.
\n" ); document.write( "-----
\n" ); document.write( "Substitute for \"y\":
\n" ); document.write( "log9(x)+(1/2) - log9(x+1) = 0
\n" ); document.write( "-----
\n" ); document.write( "log9[x/(x+1)] = -1/2
\n" ); document.write( "x/(x+1) = 9*(-1/2)
\n" ); document.write( "x/(x+1) = 1/3
\n" ); document.write( "-----
\n" ); document.write( "3x = x+1
\n" ); document.write( "2x = 1
\n" ); document.write( "x = 1/2
\n" ); document.write( "--------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "-------------\r
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