I am trying to subtract one equation from another but I can't get it to display the way that I want. This is what I have right now.

```
\begin{align*}
&y&=2x+5\\
-&&\\
&y&=3x+10\\\hline
&0&=-x-5
\end{align*}
```

Skip to content
# [Tex/LaTex] How to subtract two equations

###### Related Question

alignequations

I am trying to subtract one equation from another but I can't get it to display the way that I want. This is what I have right now.

```
\begin{align*}
&y&=2x+5\\
-&&\\
&y&=3x+10\\\hline
&0&=-x-5
\end{align*}
```

## Best Answer

This does not look very good but seems close to what your code is attempting to do, where I use

`\cline{}`

to draw the horizontal line, and`\phantom{y=}`

to push the minus sign to the left## Recomended Solution:

However, I would suggest the use of

`\intertext`

or`\shortintertext`

from the`mathtools`

package, and refer to the equations:## Notes:

`(??)`

in the cross reference.`\shortintertext`

yields better spacing but requires an additional package. Alternatively, you can use`\intertext`

which is available in`amsmath`

.`mathtools`

package already includes`amsmath`

.## Code: