Explain simply why 19 is the correct answer to: Napoleon has 17 jelly beans and Sedrich has 4 more jelly beans than Napoleon. If twice the sum of Napoleon and Sedrich's jelly beans is 4 times the number of jelly beans that Mikey has, how many jelly beans does Mikey have?. Explanation:
Sedrich has 17 + 4 = 21 jelly beans. The sum of Napoleon and Sedrich's jelly beans is 17 + 21 = 38 jelly beans. Twice the sum is 38 x 2 = 76 jelly beans. Mikey has 76 / 4 = 19 jelly beans.