Answer: 70
Explanation:
The commutative property of multiplication says that when we find a product of two numbers then it does not matter which number we write first or second.
i.e. the order of writing numbers in a product doesn't matter here.
The answer remains the exactly same.
i.e.
, where a,b are integers.
The given equation :

We can see that there is 30 in both sides , then by using commutative property of multiplication, 'm' should be 70.
hence, the unknown number : m= 70