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sandhya Good morning
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How do you use the elimination method for this question? explain, because i really want to understand!

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?