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Determina y din egalitatea
1 000-[5+2×(100+y×4)-124:4]=754


Răspuns :

1 000-[5+2×(100+y×4)-124:4]=754

5+2×(100+y×4)-31=1 000 - 754

5+2×(100+y×4)-31=246

5+2×(100+y×4)=246+31

5+2×(100+y×4)=277

2×(100+y×4)=277-5

2×(100+y×4)=272

100+y×4=272:2

100+y×4=136

y×4=136-100

y×4=36

y=36:4

y=9