Question: I need a clearer understanding of how to solve: Becky, Jake, and Silvia shared 4 pizzas. Each pizza had 8 slices. Becky ate 3 more slices than Jake did. Silvia ate twice as many slices than Jake did. If Becky ate 10 slices, how many total slices did they eat?
Answer: 
Jake ate 10-3 = 7 slices of pizza.
Silvia ate 7*2 = 14 slices of pizza.
Jake, Silvia, and Becky ate 10+7+14 = 31 slices all together.