Hi,
Are you delete the command \snappedmath?
I get that:
! Undefined control sequence.
system > tex > error on line 834 in file /home/xan/SYNC/cepasud-raw/classe/ESPA3/planificació/Tema2-Àlgebra/80-juntat.conTeXt: Undefined control sequence ...
824 % TODO: acabar les solucions
825 TODO
826 (Solucions: \startitemize[a,text] \item $x = -1$ \item $x = -1$ \item $x = -2$ \item $x = 3$\stopitemize)
827 \stopmode
828 \stopexercici
829
830 \startexercici Resol:
831
832 \startitemize[a,columns]
833
834 >> \item \snappedmath {\displaystyle 3x- (x-2) = 4x + 1}
835
836 \item \snappedmath {\displaystyle 4\left(x+3\right)-\left(2x-7\right) = 6x + 18}
837
838 \item \snappedmath {\displaystyle 5-(3-x) = 2(x+2) -3}
839
840 \item \snappedmath {\displaystyle 2x-\left(9x+2\right)+4x = 43-x+8-x-13}
841
842 \item \snappedmath {\displaystyle 2(x-2) -(5-x)=3x+2-6(x+2)}
843
844 \item \snappedmath {\displaystyle 2x-\left(x-3\right) -2\left(5-x\right) = 6-x +8x-1}
<recently read> \snappedmath
l.834 \item \snappedmath
{\displaystyle 3x- (x-2) = 4x + 1}
?
Thanks,