document.write( "Question 59720: Solve the system: x - 5y = -9
\n" ); document.write( " x = y - 1
\n" ); document.write( "One of the solutions is :\r
\n" ); document.write( "\n" ); document.write( "a) x = 1
\n" ); document.write( "b) x = -1
\n" ); document.write( "c) y = -2
\n" ); document.write( "d) y = 2
\n" ); document.write( "e) none of the above
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #41020 by funmath(2933)\"\" \"About 
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Solve the system: x - 5y = -9
\n" ); document.write( " x = y - 1
\n" ); document.write( "One of the solutions is :\r
\n" ); document.write( "\n" ); document.write( "a) x = 1
\n" ); document.write( "b) x = -1
\n" ); document.write( "c) y = -2
\n" ); document.write( "d) y = 2
\n" ); document.write( "e) none of the above
\n" ); document.write( ":
\n" ); document.write( "Substitute y-1 in for x in the first equation and solve for y:
\n" ); document.write( "(y-1)-5y=-9
\n" ); document.write( "-4y-1=-9
\n" ); document.write( "-4y-1+1=-9+1
\n" ); document.write( "-4y=-8
\n" ); document.write( "-4y/-4=-8/-4
\n" ); document.write( "y=2
\n" ); document.write( "Substitute 2 in for y in the second equation and solve for x.
\n" ); document.write( "x=2-1
\n" ); document.write( "x=1
\n" ); document.write( "The solution is (x,y)=(1,2)
\n" ); document.write( "You need both an x and y for a solution. so the answer is (a and d) or e.
\n" ); document.write( "Happy Calculating!!!
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