Question 822416
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Hi,
The price {{{highlight_green(x)}}}of a book was decreased by 20% two times in one year 
it now costs 180 $ less than the original price. What was the original price?
 x - .2x - .20(x-.2x) = $180        |multiplying thru by 10
     10x -2x -2x +.4x = 1800
               6.4x = 1800
                  x = $281.25
CHECKING our answer***
$281.25 - 56.25 - .20($225) = $281.25 - $56.25 - $45.00 = $180