Question

Z+1 , Z-1 , y+17 , y-17​

Answer 1

Answer:

your answer will be z and y

Answer 2

Answer:

(z+1)+(z-1)+(y+17)+(y-17)

z+1+z-1+y+17+y-17

z+z+1-1+17-17+y+y

2z+2y