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0.38 = (3 X 0.1) + ( X )
My sons paper instructs us to fill in the missing values. We understand that we are to fill in the two values in the second set of parenthesis, but that is all we understand.

I'm putting the answer on the right because that's how I'm used to it.

so...
(3*0.1) + (X) = 0.38
First we do the problems in parentheses. Since we are looking to find X we are not going to do that right now.
(3*0.1) = 0.3.
Now we subtract that from the equation.
0.3 + (X) =0.38
0.3 - 0.3 + (X) = 0.38 - 0.3
X = 0.35

Thanks for your help but I'm afraid I didn't make the question clear. This is actually asking for two answers.
The x is simply a multiplication symbol and we need a missing value times a missing value. Their is an actual blank to be filled in on either side of the multiplication symbol in the second set of parenthesis.

0.38 = (3 X 0.1) + ( X )
0.38= .3+x
Subtract .3 from both sides
.08=x
I don't know why you said it's asking for two answers. I really think this is the only answer.