Thread: Lining Up Systems of Equations

1. Lining Up Systems of Equations

If I have a system of linear equations in three variables, in triangular form, how can I line them up nicely in LaTex?

This is what I tried doing in a recent post. I used white dots as placeholders. Does anyone know of a more elegant way?
\displaystyle \begin{aligned} x&\; +& 4y&\; -& 2z&\; = 1 \\ {\color{white}.}&\; {\color{white}.}& y&\; -& 0.55z&\; = 0.35 \\ {\color{white}.}&\; {\color{white}.}& {\color{white}.}&\; {\color{white}.}& z&\; = 3 \end{aligned}

And this is the code I typed (I took out the [tex] tags below):
Code:
\begin{aligned}
x&\; +& 4y&\; -& 2z&\; = 1 \\
{\color{white}.}&\; {\color{white}.}& y&\; -& 0.55z&\; = 0.35 \\
{\color{white}.}&\; {\color{white}.}& {\color{white}.}&\; {\color{white}.}& z&\; = 3
\end{aligned}
TIA.

01

2. Originally Posted by yeongil
If I have a system of linear equations in three variables, in triangular form, how can I line them up nicely in LaTex?

This is what I tried doing in a recent post. I used white dots as placeholders. Does anyone know of a more elegant way?
\displaystyle \begin{aligned} x&\; +& 4y&\; -& 2z&\; = 1 \\ {\color{white}.}&\; {\color{white}.}& y&\; -& 0.55z&\; = 0.35 \\ {\color{white}.}&\; {\color{white}.}& {\color{white}.}&\; {\color{white}.}& z&\; = 3 \end{aligned}

And this is the code I typed (I took out the [tex] tags below):
Code:
\begin{aligned}
x&\; +& 4y&\; -& 2z&\; = 1 \\
{\color{white}.}&\; {\color{white}.}& y&\; -& 0.55z&\; = 0.35 \\
{\color{white}.}&\; {\color{white}.}& {\color{white}.}&\; {\color{white}.}& z&\; = 3
\end{aligned}
TIA.

01

$\displaystyle \begin{array}{rcrcrcr}x&+&4y&-&2z&=&1\\ &&y&-&0.55z&=&0.35\\ &&&&z&=&3\\ \end{array}$

\begin{array}{rcrcrcr}x&+&4y&-&2z&=&1\\
&&y&-&0.55z&=&0.35\\
&&&&z&=&3\\
\end{array}

CB

3. \displaystyle \begin{aligned} x + 4y - \phantom{0.5}2z &= 1\\ y - 0.55z &= 0.35\\ z &= 3 \end{aligned}

\begin{aligned}
x + 4y - \phantom{0.5}2z &= 1\\
y - 0.55z &= 0.35\\
z &= 3
\end{aligned}