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Answer for the clue "Like the equation "x = x + 1" ", 10 letters:
unsolvable

Word definitions for unsolvable in dictionaries

Wiktionary Word definitions in Wiktionary
a. 1 Not solvable. 2 provably not solvable.

WordNet Word definitions in WordNet
adj. not easily solved; "an apparantly insolvable problem"; "public finance...had long presented problems unsolvable or at least unsolved"- C.L.Jones [syn: insolvable , unsoluble , unresolvable ]

Usage examples of unsolvable.

The problem had been unsolvable to many students, but she had figured it out relatively quickly.

Why they did not arrange to build their vaults and incubators nearer home has always been a mystery to me, and, like many other Martian mysteries, unsolved and unsolvable by earthly reasoning and customs.

Zelana was forced to admit that pouring molten rock into the caves of the servants of the Vlagh had been far and away the most effective solution to an otherwise unsolvable problem.

It was as though day-to-day twentieth-century living had become an unsolvable algebraic equation.

My father always used to tell me that there was nothing like a good, solid, seemingly unsolvable problem to get one's teeth into and take one's mind off the usual silly anxieties which plague us.

It is simply one of the hundred unsolvable mysteries and puzzles of the subtropic region.

An equation lay there, a collapsing wave function, unsolvable using present-day mathematics.