Answered

Blank+blank+blank=30

Sagot :

Mlcparra16id
_ + _ + _ = 30
If you mean that the blanks are the same numbers then,
3 _ = 30
_ = 10
AwesomeHelperid
There is an infinite number that can take the place of that "blank" but if you are referring to the same numbers, the formula is.

30/x

wherein x = no. of blanks 

Evaluation

30/3
10

So therefore, the answer could be 10.
Checking, 10 + 10 + 10 = 30

credits to another moderator.