Răspuns:
202:2×5+[(12+88):d+262]=817
101×5+(100:d+262)=817
505+(100:d+262)=817
100:d+262=817-505
100:d+262=312
100:d=312-262
100:d=50
d=100:50
d=2
Explicație pas cu pas:
(280-78):2*5+[(4+8+88):d+262]=817
202:2*5+[100:d+262]=817
505+[100:d+262]=817
