Our technology is still too far behind to solve those types of CAPATCHAs. The field of machine learning and artificial intelligence might be able to help - so unless you are developing in that cutting edge technology, it's nearly impossible.
Is it recaptcha? If so, only one of the words needs to be guessed, the other one can be arbitrary. The one that must be correct is the one that is easier to guess as well. Also, it is very much possible to solve captchas within a reasonable success rate. As long as they aren't horribly hard for humans, they aren't too hard for programs. The hard part is writing the program!