Question

• Write an expression that is equivalent to 3(7 + x).
3(7+ x) =

Answer 1

Explanation:

3(7 + x) = 3×7 + 3x = 21 + 3x

remember, when you multiply two expressions, you need to multiply every term of the first expression with every term of the second expression, and then add all partial results (by considering the individual signs, of course).