Respuesta :

The answer is b. In b, 10 is divided from both 90 and 60, and that's gives you 9+6.
You're answer is a. 30(3 + 2)

Distribute the 30 back into the parenthesis.

30(3) = 90
30(2) = 60

90 + 60 (which is the original question).

Therefore, A is your best choice


hope this helps