First Do The Parentheses (3.5 - 3.1) to get .4
Then do the rest 7.4-.4=7
So 7 is your answer
7.4 - (3.5-3.1)
First step is to do what is inside parenthesis
(3.5 -3.1) = 0.4
Now you have 7.4 - 0.4 = 7.0
