solve (a problem); answer (a question); unravel (a riddle) / comb; untangle (hair)

untie; unravel; undo (a fastening); unwrap / dispel (doubts); clear up (a matter)

It would be good if~

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

good

easy

(obsolete) good

(colloquial, informal) good / (colloquial, predicative only) enough; not wanted any more.

better (comparative of the adjectives good or well)

all right, OK / An interjection used when comforting someone; alright