Consider the calculation of x - y + (-z) where x and z are positive real numbers an y is a negative real number. Which directions of motion for this calculation?

Is the final answer positive or negative, or undetermined?

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.

What? is there supposed to be more to this?