Converting to standard form function notation

Question

2(y+2)=f(-x) to y=f(x), or isolating y.

 

If I start by dividing 2 on both sides, does it only account for the y value?

Answer 1

2y + 4 = f(-x)

 

2y = f(-x) - 4

 

y = [f(-x) - 4 ]/2