Respuesta :

672 = (-24b)
Now you see how that's a time 24?
Well you gotta do the opposite to both side so..

672 = (-24b)
___     ____
-24       -24

-28 = b
(but the variable has to be on the left side for whatever reason, so you gotta flip it)

b = -28

Now let's check;

672 = -24(-28)
672 = 672
:) We gucci

(Now here's the steps with no interruptions)

672 = -24b
___     ___
-24      -24
-28 = b
b = -28