Fill in the gap to factorise this expression.
\[
3 x+3=3\left(x+\_\right)
\]

Answer

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Answer

\(\boxed{3(x+1)}\) is the factorised expression.

Steps

Step 1 ：Divide both terms on the left side of the equation by 3: \(\frac{3x}{3} = x\) and \(\frac{3}{3} = 1\)

Step 2 ：Insert the simplified terms into the expression: \(3(x+1)\)

Step 3 ：\(\boxed{3(x+1)}\) is the factorised expression.