Answer:
3(5n-6)
Step-by-step explanation:
You want to find the common multiple between the two numbers.
Find a number that is divisible by both numbers, and to find that, you need to factor them out using multiples that are suitable for each number
15:
5 x 3(only multiple pair that has whole numbers)
18:
9 x 2(no)
6 x 3(yes)
After you have found your answer insert it into the equation.
3(5n-6)
To check if you're right, multiply 3 into the brackets and you will get your answer.
3 x 5n - 3 x 6
15n-18
SOLVED
