Question

A $30 increase followed by a $30 decrease it is greater than the original value, less than the original value, or the same as the original value ?

Answer 1

The same as the original value.

Explanation:

Increase = Addition

Decrease = Subtraction

If you're increasing the amount of money that you have by $30, you have $30 more than your original value. When you take the $30 away again, you are back at your original value.