Ava buys a chair and two identical stools at a sale for $70.the price difference between the chair and the two stools is $30.What is the total cost of the chair and one stool?
c + 2s = 70
Since the cost difference between the chair and two stools is $30, we must assume the chair cost 50 and the two stools together cost 20 ($10 each). So the total cost of the chair and one stool would be 30+10 = $40.
Hope that helps.
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