How to use "solve" in a sentence

The Ripper murders were the first of a new kind of crime: serial killings, savage, without an obvious motive, no clues, and very difficult to solve.

Having been a mayor, he knew how to solve an awkward problem: the question of Cosette's real family He told everybody that he was not her father, but her guardian

One evening, when Marius was talking to Cosette and Jean Valjean about the mystery and his unsuccessful attempts to solve it, he became angry with Cosette's guardian's lack of interest in his story.

Thenardier's presence, however, offered him another opportunity; it gave him the chance to solve the mystery of Cosette's fortune.

Frustrated and angry at herself for her inability to solve the puzzle, she turned from the window

'I wish you could solve the crime, Miss Marple,' Griselda said

Clement, I'm going to solve this crime

It will be easy to solve this mystery.'

'Let go of me! My friends and I are going to solve this mystery.'