Question

Rubin is 5 years older than one third Terry’s age. Sheldon is three years younger than 2 times Rubin’s age. Define a variable and write an expression to represent Rubin’s age. Then find Rubin age and Sheldon age if Terry is 6 years old.

Answer 1

Ruby is 7 Sheldon is 11

Answer 2

Let Terry's age be x

Terry = x

Rubin is 5 years older than one third Terry’s age
Rubin = 5 + 1/3x

Sheldon is three years younger than 2 times Rubin’s age.
Sheldon = 2(5 + 1/3x) - 3

If Terry is 6,
Rubin = 5 + 1/3(6) = 5 + 2 = 7
Sheldon = 2( 5 + 1/3 (6)) - 3 = 11

Ans: Rubin is 7 and Sheldon is 11