Question

I got 165 but it says it wrong ?

Answer 1

1 should be the answer
when you take the the equation (3x-y+z)/(x+y)
you then sub in the know values giving you
(3•-2 - -1 +1+4) / (-2+1)
this gives you
(-6+1+4) / (-2+1)
-1/-1
=1