A mountain gorilla weighs 135 pounds and is gaining \( x \) pounds each week. An eastern gorilla weighs 143 pounds and is losing \( y \) pounds each week. Which of the following equations could be used to determine \( x \), the number of weeks that it will take until the two gorillas weigh the same amount?

\[ 135 + x \cdot t = 143 - y \cdot t \]

(Note: Make sure to adjust the variables \( x \) and \( y \) as needed if more information is given in the actual problem context.)