2. Cecile shuffles together 17 red cards and 21 blue cards. She then splits the pile of 38 cards into a small pile of 10 cards and a large pile of 28 cards. She counts the number of red cards in the small pile and the number of blue cards in the large pile. Explain why these 2 counts must differ by exactly 11.

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!