1

If I have a document as shown

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{align*}
&y= 3x +2\\
&\implies x &&= 48 \\
&&= \sin{x}
\end{align*}

\end{document}

and I want to align the places with double & together and the points with & together how do I do them both at the same time?

  • How do I add a sketch? – user61882 Feb 17 at 16:45
  • It is a picture showing what you need. – user156344 Feb 17 at 16:53
3

Here are three other possibilities, with mathtools (which extends amsmath) and makebox:

\documentclass{article}
\usepackage{mathtools}
\usepackage{makebox}

\begin{document}

\begin{alignat*}{2}
 & & y & = 3x +2\\
\ArrowBetweenLines[\Downarrow] & & x &= 48 \\
& & & = \sin{x}
 \end{alignat*}

\begin{alignat*}{2}
y & = 3x +2 & & \\
\ArrowBetweenLines*[\Downarrow] x &= 48 & &\\
& = \sin{x}& &
 \end{alignat*}

\begin{align*}
y & = 3x +2\\[-0.5ex]
 &\makebox*{${}= {}$}{$ \Downarrow $}\\[-0.5ex]
x &= 48 \\
&= \sin{x}
\end{align*}

\end{document} 

enter image description here

3

If I understood the question correctly:

Quick hack (corrected by John Kormylo in his comment)

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{align*}
&y= 3x +2\\
&\implies x = 48 \\
& \phantom{\null\implies x}= \sin{x}
\end{align*}

\end{document}

screenshot

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{align*}
&y= 3x +2\\
&\implies x &&= 48 \\
&&&= \sin{x}
\end{align*}

\end{document}

screenshot

  • That is sort of it, I would like the 48 to be next to the x though like ` $x=48$` and the $\sin{x}$ underneath the 48 – user61882 Feb 17 at 16:46
  • 1
    Is a quick hack like this suitable for you? – AndréC Feb 17 at 16:53
  • Use \phantom{\null\implies x}. Operators need operands (or &) on both sides. – John Kormylo Feb 17 at 20:34
1

Another kind of alignment. It concerns the alignment of the symbol =

enter image description here

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*}
y&= 3x +2 \implies\\
x &= 48 \\
&= \sin{x}
\end{align*}
\end{document}
  • That is closer but imagine that I wanted only the $\sin{x}$ and 48 aligned together and the $\implies$ aligned with the $y$ – user61882 Feb 17 at 17:00

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