Ответ:
55 - 8x = 7
-8x = 7 - 55
-8x = -48
x = 6
27 / y + 29 = 38
27 / y = 38 - 29
27 / y = 9
27 = 9y
9y = 27
y = 3
(t - 25) / 20 = 9
t - 25 = 180
t = 180 + 25
t = 205
6 * ( 18 - k ) = 54
18 - k = 9
-k = -9 - 18
-k = -9
k = 9
(60a - 30) / 15 = 18
15(4a - 2) / 15 = 18
4a - 2 = 18
4a = 18 + 2
4a = 20
a = 5
92 + 56 / (14 - b) = 100
56 / (14 - b ) = 100 - 92
56 / (14 - b) = 8
56 = 8 * (14 - b)
7 = 14 - b
b = 14 - 7
b = 7
(c / 9) * 15 - 47 = 28
(c / 3) * 5 - 47 = 28
5c/3 - 47 = 28
5c - 141 = 84
5c = 84 + 141
5c = 225
c = 45
(410 - d) / 7 + 70 = 120
410 - d + 490 = 840
900 - d = 840
-d = 840 - 900
-d = -60
d = 60