Answer:

Step-by-step explanation:
Let the missing integer be x
Solve for x

Move 3 to right hand side and change it's sign

The negative and positive integers are always subtracted but posses the sign of the bigger integer

Change the signs of both sides

Hope I helped!
Best regards! :D
Answer:
x
=
±
√
5
−
2
Step-by-step explanation:
2.57 is the anwser. it comes out to be 2.56666667 which woukd round up to 2.57