# Align a wall of equations

I have a wall of equations in the format: y = x^2 = 9

So basically, it's the variable part, the equation part and the answer part. I want these to be in three columns that are all aligned. So my wall of equations looks like this:

Using this formula $C_{in} = \frac{C_{out}g_i}{\hat{f}}$
$C_{in-nand3} = \frac{30 * 1.21739}{3.3098} = 11.0344 \rightarrow \frac{11.0344}{2.75} = 4.0125$
$C_{in-nand2} = \frac{6.153 * 1.21739}{3.3098} = 2.263 \rightarrow \frac{2.263}{2.75} = .8229$
$C_{in-nand1} = \frac{5.514 * 1.21739}{3.3098} = 2.0279 \rightarrow \frac{2.0279}{2.75} = .7374$


There's more but you get the idea. I looked at other posts that suggested I put a

\begin{align}
\end{align}


Around the whole thing, I did that but when I tried to compile in TexStudio it spat out this list of errors: I have no idea what it is asking about. Does anyone know how I can achieve the alignment that I want?

• You should have a look at this question which provides a solution to your problem. – Vincent Nivoliers Mar 28 '13 at 15:50
• The align environment puts its material into display-math mode automatically. Thus, remove the \] and  items, and be sure to terminate all but the very last line with a \\ (double backslash) directive. – Mico Mar 28 '13 at 15:53 ## 1 Answer In align environment you should use & like this: \begin{align} C_{in-nand3} & = \frac{30 * 1.21739}{3.3098} = 11.0344 \rightarrow \frac{11.0344}{2.75} = 4.0125 \\ C_{in-nand2} & = \frac{6.153 * 1.21739}{3.3098} = 2.263 \rightarrow \frac{2.263}{2.75} = .8229 \\ C_{in-nand1} & = \frac{5.514 * 1.21739}{3.3098} = 2.0279 \rightarrow \frac{2.0279}{2.75} = .7374 \end{align}  This will align all equations. • okay now I have: \begin{align} Using this formula C_{in} = \frac{C_{out}g_i}{\hat{f}}: C_{in-nand3} & = \frac{5.493 * 1.21739}{3.3098} = 2.02 \rightarrow \frac{2.02}{2.75} = .735 \ C_{in-nand2} & = \frac{(2.02 + 12.97) * 1.21739}{3.3098} = 5.514 \rightarrow \frac{5.514}{2.75} = 2.005 \ C_{in-nand1} & = \frac{5.514 * 1.21739}{3.3098} = 2.0279 \rightarrow \frac{2.0279}{2.75} = .7374 \end{align} but that gives me these errors i.stack.imgur.com/WWPSE.jpg – Richard Mar 28 '13 at 15:53 • C_\textnormal{in-nand3} will avoid typesetting the subscript in math font with the hyphen becoming a minus sign. – egreg Mar 28 '13 at 15:55 • @Richard: Place this: Using this formula C_{in} = \frac{C_{out}g_i}{\hat{f}}: before the \begin{align}. – m0nhawk Mar 28 '13 at 15:59 • since the original question used \[..., i'd guess that no equation numbers are wanted, so align* would seem a better choice of environment. – barbara beeton Mar 28 '13 at 16:12
• Okay nvm, I fixed it now! I just had an empty space after \begin{align} and the first equation, texstudio didn't like that. – Richard Mar 28 '13 at 16:17