n + 2(7 +3n) - 3n which algebraic expression has the same value as the above? 2(7 + 2n),  2(7 + n), n + 14, 21n - 3,      14 + 3n.

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It's the same as 2(7+2n). First, try to solve your original expression:n + 2(7 + 3n) - 3n = n + 14 + 6n - 3n= 7n - 3n + 14 = 4n + 14Then you check the possibilities you have to choose from for the one that matches 4n + 14. Which in this case will be 2(7 + 2n) as 2(7 + 2n) = 14 + 4n or 4n + 14