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?


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

Quote:

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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?


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

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

CB

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