Vibe killer alert! am i right?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle