title: How do you align a system of equations?
body: <p>I want these equations to line up so that all variables and operators go straight down. I've tried a few different techniques but haven't been able to get it to work.</p>
  
  <p><a href="https://i.stack.imgur.com/AMcQM.png" rel="noreferrer"><img src="https://i.stack.imgur.com/AMcQM.png" alt="enter image description here"></a></p>
  
  <p>Nope:</p>
  
  <pre><code>\begin{align*}
    x+y+z=1 \\ 
    x+y+z=\frac{5}{2} \\ 
    x+y+z=5
  \end{align*}
  </code></pre>
  
  <p><a href="https://jsfiddle.net/8L4t3ehf/1/" rel="noreferrer">fiddle</a>.</p>