Evaluate algebraic expressions correctly using substitution and order of operations.
Substitute into a one-variable expression
Problem
Evaluate \(3x~+~2\) when \(x~=~4\).
Big Picture
What this problem is really about
Substitution replaces the variable while preserving the expression’s operations. Put four in x’s place, remembering that the coefficient next to x means multiplication, then follow the usual order of operations. Evaluate the product before adding the constant, and keep every original term in the calculation.
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