30 - 6n when n = 5  , 5 - Simplify: 5/n when n = 1  , 21 - 7r  when r = 3, 13 - 9 + b when b = 4 , 40 -  8z when z = 5 , 9 - 5 + h when h = 4, 2 - 4/x when x = 2, 16 - 8a when a = 2 , 3 - x - 9 when x =12 , 11 - x + 9 when x = 2, 27 - 9f when f = 3 ,

Simplifying & Evaluating Algebraic Expressions

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