Пошаговое объяснение:
18*(7x+96)=1854
7x + 96 = 1854:18
7x + 96 = 103
7x = 103 - 96
7x = 7
x = 1
24:(42-2x)=8
42 - 2x = 24 : 8
42 - 2x = 3
2x = 42 - 3
2x = 39
x = 39 : 2
x = 19,5
