The subject of the formula below is y.
y =x+5
rearrange the formula to make x the subject.

x = y - 5

Step-by-step explanation:

Given

y = x + 5 ( isolate x by subtracting 5 from both sides )

y - 5 = x

x = y - 5

Step-by-step explanation:

y = x + 5

subtract 5 left and right of the = sign , which gives you the answer.

y - 5 = x + 5 - 5

+5 - 5 = 0 so...

y - 5 = x

re arrange and voila!

x = y - 5

i believe that the answer is

b. y-1=-2(x-4)

hope this !