38×b-989при b,равном 54,612,304 (105×18): d+205при d,равном 5,15,45.

38 * b - 989
b = 54
38 * 54 - 989 = 2052 - 989 = 1063

b = 612
38 * 612 - 989 = 23 256 - 989 = 22 267

b = 304 
38 * 304 - 989 = 11 552 - 989 = 10 563

(105 * 18) : d + 205
d = 5
(105 * 18) : 5 + 205 = 1890 : 378 + 205 = 583

d = 15
(105 * 18) : 15 + 205 = 1890 : 15 + 205 = 126 + 205 = 331

d = 45
(105 * 18) : 45 + 205 = 1890 : 45 + 205 = 42 + 205 = 247