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1000-[36-6X9-(a:3+15)]:3=76

Răspuns :

1000-[36-6X9-(a:3+15)]:3=76
1000 - [36 - 54-(a:3+15)] : 3 = 76
[36 - 54 - (a:3+15)] : 3 = 1000 - 76

[36 - 54 - (a:3+15)] : 3 = 924

36 - 54 - (a:3+15) = 924×3

36 - 54 - (a:3+15) = 2 772

a : 3 + 15 = 36 - 54 - 2772

a : 3 = - 2790 - 15

a : 3 = - 2805

a = -2805 × 3

a = - 8415