2,5-(-7)

To solve the expression \(2.5 - (-7)\), you can simplify it as follows:

Subtracting a negative number is the same as adding the positive version of that number.

So, \[ 2.5 - (-7) = 2.5 + 7 \]

Now, add \(2.5\) and \(7\): \[ 2.5 + 7 = 9.5 \]

Thus, the answer is \(9.5\).