your answer in going to be 1 because
3y-z/y+5z = 3*6-2/6+5*2
3*6=18-2+16 5*2=10+6=16
16/16=1
(3y - z) / (y + 5z)
z= (3(6)-2) / (6 + 5(2))
= 16 / 16
= 1 (answer)