Question

2. If y(x-1)=z then x=
y-z
z/y + 1
y(z-1)
z(y-1)
1-zy

Answer 1

you all got the correct answer, but it was not one of the choices. You didn't simplify (z+y)/y to z/y + 1

Doing different steps would have provided the correct choice directly:

y(x-1)=z
x-1 = z/y
x = z/y + 1