Evaluate algebraic expressions correctly using substitution and order of operations.
Evaluate a grouped expression after substitution
Problem
Evaluate \(2(x~+~5)\) when \(x~=~3\).
Big Picture
What this problem is really about
Replace x with three without changing the parentheses or the outside factor. The grouping tells you to evaluate the inner sum before applying the multiplication, so preserve that structure through substitution. Only after the quantity inside is simplified should the factor of two be used.
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