N=3x45 write what n represents in the related division problem

First, you should probably solve the equation. 

3 x 45 = 135

So n = 135. 

For a division problem to work, the bigger number has to come first, so there are two possible answers. 

135 / 45 = 3
135 / 3 = 45

Now all you need to do is put the n back in. 

n / 45 = 3
n / 3 = 45

Wow. that is a really cool question.