Question

I think of a number. i add 7 to it and then divide by 10. my answer is 3.8. what number did i start with

Answer 1

Answer:

31

Step by step:

You need to do it in reverse:

Devidng Becomes multiplying so its 3.8x10=38

Then same for this + = - do its 38-7=31

So answer is 31