if this face represent 100,000 CD,s How many sales do 4 CD symblos represent?

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= 100,000 CD's, from your definition Multiply both sides by 4 (you can do this because you are doing the same thing to and equation) 4 x = 4 x 100,000 CD's 4 x = 400,000 CD's 4 's equals 400,000 CD's

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