The question is the following. Consider the Diophantine equation $3^x + 2y = 5^z$. Then $x, y , z$ must necessarily be even numbers ?
closed as off-topic by Martin Sleziak, user44191, Sean Lawton, Emil Jeřábek, Jeremy Rickard Mar 14 at 14:09
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question does not appear to be about research level mathematics within the scope defined in the help center." – Martin Sleziak, user44191, Sean Lawton, Jeremy Rickard