1)
12c * 4 = 48c
17 * 3d = 51d
11p * 5g = 55gp
=======
2)
18x - 4x + x = 15x
при х=8
15 * 8 = 120
--------
45a - 9a - 7a + 29 = 29a + 29
при a = 13
29 * 13 + 29 = 29*14 = 406
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3)
15t - 7t = 56
8t = 56
t = 56 : 8
t = 7
---------
3z + 2z = 35
5z = 35
z = 35 : 5
z = 7
-----------
4d + d - 4d = 44
d = 44
----------
7s + 2s - 9s = 9
0 ≠ 9
нет решений
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4)
1)76*528=40128
2) 40128+49972 = 90100
3) 90100 : 170= 530
4) 530 - 62 = 468
5) 468 :12 = 39
ответ: 39