First you find the middle then you measure the other side
are you sure this is not a joke this is very easy
Answer:
If the x is a multiplying sign then the answer is 6, but
if the x is the letter x then it will be x=4
540=
54*10=
6*9*2*5=
2*3*3*3*2*5=
2*2*3*3*3*5 or in exponential form
(2²)(3³)(5)
