Which of the pairs of expressions are equivalent?

Question

(d / 8) / 4 and d / (8 / 4)

(y - 9) - 8 and y - (9 - 8)

x * (5 + 2) and (x * 5) + 2

(k * 18) * 0.5 and k * (18 * 0.5)

Answer 1

The pairs of expressions that are equivalent are:

(d / 8) / 4 and d / (8 / 4)

and

x * (5 + 2) and (x * 5) + 2