Simplify (5+n)*3

$(5 + n) \cdot 3$

Apply the distributive property.

$5 \cdot 3 + n \cdot 3$

Simplify the expression.

Multiply $5$ by $3$ .

$15 + n \cdot 3$

Move $3$ to the left of $n$ .

$15 + 3 n$

$15 + 3 n$

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