Can somebody help me find the answer to this problem please ?

What is the value of x in the figure below? if necessary, round your answer to the nearest tenth of a unit. 12 d 4 b оа. 3.1 ов. 6.9 ос. 4 od. 12

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?