What’s the difference between 123-42

To find the difference between a set of numbers you must use subtraction. In this situation you are trying to find the difference between 123 and 42. So you would subtract 42 from 123
123-42
You then would get an answer of 81
So the difference between 123 and 42 is 82

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!