Amiti Software Technologies Entry Level Java Developer interview questions

If have interview atAmity Software, You must have good knowledge in any programming and specially in array and string topics. They will not going to ask simple questions like a fresher, you will have a question like 5 year experienced pro coder. So there was 3 rounds, 1st and 2nd was coding round and third was technical+hr. I attended first round and could not qualify for the next round. Question is given below. first round - find missing integer(find the value of x from given mathematical expression as a string) input: "5X-5=20" outpu: 5