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

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

triumphant, proud / skilled

strong point / triumph / regular customer

instruction; teaching; school; lesson, class

teach; to instruct; give a lesson

addition and subtraction / adjustment, moderation / degree, amount (of seasoning, heating, etc.) / physical condition, how one is feeling

the degree of / to that degree / just right

adjust, make an allowance

mathematics (field of study)