Question

УРАВНЕНИЕ
(d- 389) x 3 =807

Answer 1

(d-389)×3=807
3d-1167=807
3d=807+1167
3d=1974
d=658

Answer 2

(d - 389) * 3 = 807

d - 389 = 807 : 3

d - 389 = 269

d = 269 + 389

d = 658

Проверка: (658 - 389) * 3 = 807

                   269 * 3 = 807

                   807 = 807

Ответ: d = 658.