Răspuns:
[(b x 14 - 784: 14) - (52 - 144: 6)] x 100 = 1000
[(14b - 56) - (52 - 24) x 100 = 1000
(14b - 56 - 28) x 100 = 1000
(14b - 84) x 100 = 1000
14b - 84 = 10
14b = 94
b = 94 : 14 / :2
b = 47:7 = 47 supra 7
(64 : 8 + 10 × 6 + b) : [72 : 4 - (6 × 10 - 53)] = 7
(8 + 60 + b) : [18 - (60 - 53)] = 7
(68 + b) : (18 - 7) = 7
(68 + b) : 11 = 7
68 + b = 77
b = 9
