Glenn receives 6 birthday cards. If he is equally likely to read the cards in any order. What is the probablitiy that her reads the cards from his parents and his sister before he reads other cards

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!