Consider the following premises. For all x_3, x_3 will not make tea. For all x_3, x_3 is an office clerk or x_3 will climb a mountain. For all x_3, x_3 will make tea if and only if x_3 is an office clerk. Can we infer the following from them? For all x_3, x_3 will make tea if and only if x_3 is an office clerk.
That is one of the premises. Therefore, the answer is yes.