Răspuns:
1900-X×[6471:9-(3×5×10+25)×4)=1083
1900-X*[719-(150+25)*4]=1083
1900-X*(719-175*4)=1083
1900-X*(719-700)=1083
1900-X*19=1083
X*19=1900-1083
X*19=817
X=817÷19
X=43
1900-43*[6471:9-(3*5*10+25)*4]=
1900-43×[719-(150+25)*4]=
1900-43*(719-175*4)=
1900-43*(719-700)=
1900-43*19=
1900-817=1083