Question

SOLVE D=ABC FOR B

Answer 1

You need to divide by AC by both sides to get B alone

Answer 2

\[B=\frac{D}{AC}\]

Answer 3

The previous answers give you what you need. I'm just playing around with this equation tool, so I'll give you a much more verbose answer: D = ABC is the same as ABC = D, right? So then
\[\frac{ ABC }{ AC } = \frac{ D }{ AC }\]
The 'A's cancel on the right side, and so do the 'C's... this leaves you with the solution above
\[B = \frac{ D }{ AC }\]
Yeah, that little "Equation" button below the chat text box works pretty good!