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Home > Latex > FAQ > Latex - FAQ > How to display formulas inside a box or frame in Latex ? \boxed

## How to display formulas inside a box or frame in Latex ? \boxed

\usepackage{amsmath}
$$\boxed{u=1}$$ $$\boxed{ \begin{array}{rcl} x + -y + z -t & = & 0 \\ 2x + 2y + 2z +3t & = & 0 \end{array} }$$