Linear Equations - What's wrong with my solution?

Question

This is the math problem: -(b-1) = 1(1-4) - 4(b+8) This is what I came up with:

-b + 1 = 1 - 4 - 4b - 32
-b + 33 = 1 - 4 - 4b
-5b + 33 = 1 - 4
-5b = -3 - 33 
-5b = -36
b = -36/-5

and It's apparently wrong for some reason. I'm supposed to get b = -12. Where am I doing it wrong? Also does the order of operations matter here?

Answer 1

It should be this:

$-b + 1 = 1 - 4 - 46 - 32$

$-b + 33 = 1 - 4 - 4b$

$\color{red}3b + 33 = 1 - 4$

$3b = -3 - 33 $

$3b = -36$

$b = -12$

Answer 2

In passing from the second line to the third you have an error. You should add $4b$ to the left hand side, not subtract.