document.write( "Question 558896: When a number is decreased by 20% of itself, the result is 20. What is the number? \n" ); document.write( "
Algebra.Com's Answer #363256 by Theo(13342)\"\" \"About 
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x equals the number.
\n" ); document.write( "x - .2 * x = 20
\n" ); document.write( "combine like terms to get:
\n" ); document.write( ".8 * x = 20
\n" ); document.write( "divide both sides of this equation by .8 to get:
\n" ); document.write( "x = 20 / .8
\n" ); document.write( "simplify to get:
\n" ); document.write( "x = 25
\n" ); document.write( "confirm by substituting in the original equation.
\n" ); document.write( "25 - .2 * 25 = 20
\n" ); document.write( "25 - 5 = 20
\n" ); document.write( "20 = 20
\n" ); document.write( "x is confirmed to be good.
\n" ); document.write( "-----
\n" ); document.write( "decimal equivalent for 20% is 20% divided by 100% = .2
\n" ); document.write( "x - .2 * x is equivalent to x * (1 - .2) which becomes x * .8 which is the same as .8 * x.\r
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