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Write an equation. Let x be the unknown number.five less than twice a number is 19.find the volume of a sphere with a radius of 3mTwice the difference of a number and 3 equals 8 .A sales tax of 13.00% increased the cost of a meal to 30.65. What was the cost of the meal before sales taxes?The wholesale price for a chair is 156. A certain furniture store marks up the wholesale price by 21%. Find the price of the chair in the furniture store.Round your answer to the nearest cent, as necessary.