Question

Kims age is twice that of her sisters age. when you add Kim's Aga to her sister's age, you get 40, how old is each sister?

(a) write an equation that represents the situation. explain any variables used.
(b) solve the equation from part a. show your work. state your solution as a complete sentence

Answer 1

x is Kim's age, y is her sister's age


`x = 2y \\ x + y = 40 \\ 2y + y = 40 \\ 3y = 40 \\ y = (40)/(3) \\ x = (80)/(3)`
her sister is 13 and a third,

Kim is 26 and two thirds