Answer:
Each box contains 15 rocks.
Step-by-step explanation:
Solution: (18 x 5) ÷ 6 = N
Step 1: find the product of the numbers inside the parenthesis.
(18 x 5) = 90
∨
(90) ÷ 6 = N
Step 2: divide the number inside the parenthesis to number 6 to get the answer.
90 ÷ 6 = 15
∨
N = 15
