When a positive integer is expressed in base 7, it is $AB_7$, and when it is expressed in base 5, it is $BA_5$.  What is the positive integer in decimal?
Question:
When a positive integer is expressed in base 7, it is $AB_7$, and when it is expressed in base 5, it is $BA_5$.  What is the positive integer in decimal?
Answer:
Let's think step by step.

user
17
When a positive integer is expressed in base 7, it is $AB_7$, and when it is expressed in base 5, it is $BA_5$.  What is the positive integer in decimal?
train