Subtract 6 from me. Then multiply by 2. If you subtract 40 and
then divide by 4, you get 8. What number am I?

42

Step-by-step explanation:

Let the number be "x"

We translate the word equation to algebraic equation.

First,

subtract 6 from me, so we have:

x - 6

Now,

Multiply by 2, so we have:

2(x-6)

Now,

Subtract 40, then divide by 4:

Now, you get "8", so equate this to 8, we get:

We now solve using algebra:

The number is 42

2.83941151 would be the answer you're looking for! : )