I think you have written the question slightly wrong
Correct Question
[tex]\\ \sf\longmapsto 4(1-x)=3(2-x)[/tex]
Ans:-
[tex]\\ \sf\longmapsto 4-4x=6-3x[/tex]
[tex]\\ \sf\longmapsto 4-6=-3x+4x[/tex]
[tex]\\ \sf\longmapsto -2=x[/tex]
[tex]\\ \sf\longmapsto x=-2[/tex]
