Which one of these numbers is not like the others 21, 15 ,6 ,16, 27

16

16 does not give a answer (that does not have a decimal - only a whole number) when it is divided by 3

hope this helps

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!