nine more then four times a number is the same as once less than twice the number. Write an equation and solve

Which pair of angles are vertical angles? ∠1 and ∠4∠1 and ∠2∠2 and ∠4∠2 and ∠3more than one answer.

Ineed with number 17 i don’t get it at alll

Pls me this is due today and i need i will make brainliest if you me answer correctly and i will report if you try to give me a dumb answer.