Making enumerate equations aligned

Question

I'm quite new to latex and need help making my equations in enumerate aligned by "b" for school project.

Right now it looks like:

But I need it to look like:

My code right now:

Thank you for your help!

Answer 1

A solution with listliketab in the place of `enumerate:

\documentclass[11pt, a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lipsum}
\usepackage{listliketab}

\begin{document}

\storestyleof{enumerate}
\newcounter{tabenum}\setcounter{tabenum}{0}
\newcommand{\tabitem}{\refstepcounter{tabenum}\thetabenum)}
\setlength{\tabcolsep}{1em}
\begin{listliketab}
  \begin{tabular}{L*{2}{>{$}l<{$}}}
    \tabitem & a = 5, & b = 3 \,; \\
    \tabitem & a = 4, & b = 6 \,; \\
    \tabitem & a =3{,}2, & b = 2{,}3 \,; \\
    \tabitem & a = 2\sqrt{5}, & b = 3\sqrt{5} \,; \\
    \tabitem & a = \sqrt{3}, & b = \sqrt{7} \,; \\
    \tabitem & a = 1, & b = √{0{,}1}.
  \end{tabular}
\end{listliketab}

\end{document}

Another solution, based on a code by @Werner for switching between left and right equation numbers within the same document, and the fleqn environment from nccmath. The = signs will be aligned in both columns:

\documentclass[11pt, a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lipsum}

\usepackage{amsmath}
\usepackage{nccmath}
\makeatletter
\newcommand{\leqnomode}{\tagsleft@true}
\newcommand{\reqnomode}{\tagsleft@false}
\makeatother

\begin{document}

\begin{fleqn}[2em]
\leqnomode
\begin{alignat}{2}
a &= 5, & b & = 3 \,; \\
a & = 4, & b & = 6 \,; \\
a & =3{,}2, & b & = 2{,}3 \, ; \\
a & = 2\sqrt{5}, &\qquad b & = 3\sqrt{5} \, ; \\
a & = \sqrt{3}, & b & = \sqrt{7} \, ; \\
a & = 1, & b & = \sqrt{0{,}1}.
\end{alignat}
\end{fleqn}

\begin{align}
  f(x) &= ax^2 + bx + c \\
  g(x) &= dx^2 + ex + f
\end{align}

\end{document}