"The pink trousers are his."

Translation: De rosa byxorna är hans.

[marcocaramori]

For anyone else wondering about that 'De':

When an adjective or numeral is used in front of a noun with the definite article, an additional definite article is placed before the adjective(s). This additional definite article is det for neuter nouns, den for common nouns, and de for plural nouns, e.g. den nya flaskan (the new bottle), det nya brevet (the new letter), de fem flaskorna (the five bottles).

Source:
http://en.wikipedia.org/wiki/Swedish_grammar#Articles_and_definite_forms

[Nauman007]

You are a savior. Tack snälla

[SrMarien]

Thank you!

[monteirorogerio5]

Tack så mycket. Du förtjänar en Lingot!

[dcounts]

Thank you. That would have driven me nuts at some point.

[thegayagenda]

whats with the "de" and the "the" added to byxor

[devalanteriel]

Please refer to the top comment in this thread.

[Nala47968]

Can one use honom here?

[4oYBIxtO]

No. That would be ”The pink trousers are him”

[Yama842603]

Why can't I use sin or sitt here?

[4oYBIxtO]

See the coments below