Answer:
33
Explanation:
Here, d represents the number of push-ups Darnell completed during his previous personal best and k represent the number of push-ups Katie completed,
∵ According to the question,
Darnell's current push ups = d + 8,
Mia's push-ups = d,
Katie push-ups = d + 6
Again according to the question,
d + 8 = 35 ⇒ d = 27,
Hence, the number of push-ups completed by Katie, k = d + 6 = 27 + 6 = 33