Answer:
25
Explanation:
if it needs to in a fraction or whatever i don't know.
But, here's why i got 25,
if x is 1 then you times 6 by 1 then you get 6 and if z is 5 then you times 5 by 3 and you get 15 so,
34 add 6 equals 40
40 take away 15 equals 25
HOPE THIS HELPS YOU :)
tell me if you got it wrong or right
THANKS:)