Question

Gabrielle's age is two times Mikhail's age. The sum of their ages is 84. What is Mikhail's age?

Answer 1

Let x be Gabrielle’s age
Let y be Mikhail’s age
X=2y and x+y=84 so...
X=2y and x=84-y so by substitution of x,
2y=84-y
3y=84
Y=28

So Mikhail is 28
And Gabrielle is 56

Answer 2

28

Explanation:

Mikhail's age:x

Gabrielle's age:2x

x+2x=84

3x=84

x=84÷3

x=28