Hello,
My way is not very elegant but I would do this:
Formula
arrow text
Formula
arrow text
Formula
arrow text
Formula
#########################################################
\startuseMPgraphic{MyArrow}
path p ;
p:=(0,0){right}..(0.5cm,-0.6cm)..(0,-1.2cm){left} ;
drawarrow p withpen pencircle scaled 1.5bp withcolor 0.625white ;
\stopuseMPgraphic
\starttext
\showgrid
\math{A\times X=B}
\hfill On multiplie, à gauche, les deux membres de l'égalité par
\math{A^{-1}}.
\hskip 5cm \relax \dontleavehmode\useMPgraphic{MyArrow}
\math{A^{-1}\times A\times X=A^{-1}\times B}
\hfill On utilise l'égalité \math{A^{-1}\times A=I}.
\hskip 5cm \relax \dontleavehmode \useMPgraphic{MyArrow}
\math{I\times X=A^{-1}\times B}
\hfill On utilise l'égalité \math{X\times I=I\times X=X}.
\hskip 5cm \relax \dontleavehmode \useMPgraphic{MyArrow}
On a donc \math{X=A^{-1}\times B}
\stoptext
#########################################################
Thanks,
Fabrice
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