Explanation :
Move a matchstick from the + sign and place it on the left side of the number 9, so the 9 becomes an 8.
The final equation will be 8 + 3 = 5.
Matchstick Image : solve-answer-image-9-3-5-matchstick-equation
Matchstick Image : answer-image-9-3-5-matchstick-equation