Answer
no
Work Step by Step
$30=3(n-3)$$\longrightarrow$ distributive property
$30=3n-9$$\longrightarrow$ addition property of equality
$30+9=3n-9+9$$\longrightarrow$ add
$39=3n$$\longrightarrow$multiplication poperty of equality
$39\div3=3n\div3$$\longrightarrow$ divide
$13=n\ X$$\longrightarrow$ 14 is not a solution