document.write( "Question 1035853: one decreased by the difference between 18 and seven times a number is -9 \n" ); document.write( "

Algebra.Com's Answer #650909 by Cromlix(4381) $\"\"$ $\"About$

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Hi there,
\n" ); document.write( "one decreased by the difference
\n" ); document.write( "between 18 and seven times a number is -9.
\n" ); document.write( "Make the number = x
\n" ); document.write( "1 - (18 + 7x) = -9
\n" ); document.write( "Multiply out.
\n" ); document.write( "1 - 18 - 7x = -9
\n" ); document.write( "Collect like terms:
\n" ); document.write( "-7x = -9 + 18 - 1
\n" ); document.write( "-7x = 8
\n" ); document.write( "x = 8/-7
\n" ); document.write( "The number = -8/7
\n" ); document.write( "Proof:
\n" ); document.write( "1 - (18 + 7x) = -9
\n" ); document.write( "1 - (18 + 7(-8/7)) = -9
\n" ); document.write( "1 - (18 - 8) = -9
\n" ); document.write( "1 - (10) = -9
\n" ); document.write( "1 - 10 = -9
\n" ); document.write( "-9 = -9.
\n" ); document.write( "Hope this helps :-) \n" ); document.write( "

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