Răspuns :
1000-[5+2*(100+z*4)-124:4]=754
5+2*(100+z*4)-124:4=1000-754
5+2*(100+z*4)-31=246
5+2*(100+z*4)=246+31
5+2*(100+z*4)=277
2*(100+z*4)=277-5
2*(100+z*4)=272
100+z*4=272:2
100+z*4=136
z*4=136-100
z*4=36
z=36:4
z=9
5+2*(100+z*4)-124:4=1000-754
5+2*(100+z*4)-31=246
5+2*(100+z*4)=246+31
5+2*(100+z*4)=277
2*(100+z*4)=277-5
2*(100+z*4)=272
100+z*4=272:2
100+z*4=136
z*4=136-100
z*4=36
z=36:4
z=9