Expanding brackets

Question 1

How do you expand 3(4-x)?

Answer 1

Just multiply each factor of the bracket by 3. This means that the answer is 12-3x.

Question 2

How do you expand and simplify 3(4-x)+4(3+x)?

Answer 2

For this question you must expand each of the brackets separately and then collect and simplify terms. 12-3x + 12+4x = 24 + 1x or 24 + x.