HKIMO 2019 Grade 6 National Final (Heat) Set 02 Question 2

Take Andy’s brother’s age this year, subtract 6, multiply by 5, add 9 and divide by 7. The result is 22. How old is Andy’s brother this year?

Source glossary (English–Vietnamese): Minuses: trừ; Multiplies: nhân; Adds: cộng; Divided by: chia; Result: kết quả.