Hi! please help me the blue line is what I have to find.

Answer:
Pretie sure answer is 0
Step-by-step explanation:
first you take the 1 and subtract it from -3
which is -2 then add the other 2 to the -2 which is 0
then you devide 5 with 5 and 5 with zero which leaves you with zero and 0=x