SOLUTION: if the cost of an article is raised by 9% to 654 then what is the orignal cost of article?

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Question 1183016: if the cost of an article is raised by 9% to 654 then what is the orignal cost of article?
Answer by MathLover1(20850) About Me  (Show Source):
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let the original cost of article be x
the cost of an article is raised by 9% or 0.09 to 654
then
x%2B0.09x=654
1.09x=654
x=654%2F1.09
x=600
the original cost of article is 600