Aligning multiple equations in MathJax

Question

Is there a way to align multiple equations so the equators are underneath each other using MathJax?

For example:
 2x - 4 = 6
     2x = 10
      x = 5

Answer 1

Use the aligned environment and the & symbol.

e.g.

$$\begin{aligned} 2x - 4 &= 6 \\ 2x &= 10 \\ x &= 5 \end{aligned}$$

I inserted & in front of = of each line, so the horizontal positions of = will be equal for all lines.

If you do not need such horizontal alignment, then you can use gathered environment instead of aligned environment without &.