Answer:

Explanation:
Now we have to,
→ Simplify the given expression. 
The property we use,
→ Distributive property. 
The expression is,
→ 3(x + 4) 
Let's simplify the expression,
→ 3(x + 4) 
→ 3(x) + 3(4) 
→ (3 × x) + (3 × 4) 
→ 3x + 12 
Hence, the answer is 3x + 12.