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The diện tích of a rectangle is 72 square inches. The rectangle is 9 inches long.:How wide is the rectangle?The diện tích of a triangle is 48m^2. If the base is 8m, what is the height of the triangle?The hiệu of twice a number and 6 is at least 24The hiệu of 5 and a number is 3.2 more than two times the numberalana is 2 years younger than tommy and the sum of their ages is 16. how old is alana