Пошаговое объяснение:
1)
7*(x + 2) = 3(x - 8)
7x + 14 = 3x - 24
7x - 3x = -24 - 14
4x = -38
x = -38 : 4
x = -9,5
(-9.5 - 8)/(-9.5 + 2) = 7/3
-17,5/-7,5 = 7/3
-3,5/-1,5 = 7/3
-7/-3 = 7/3
7/3 = 7/3
2)
15*(x - 1,2) = 4*(x - 10)
15x - 18 = 4x - 40
15x - 4x = -40 + 18
11x = -22
x = -22 : 11
x = -2
4/(-2-1,2) = 15/(-2 - 10)
4/(-3,2) = 15/(-12)
-1,25 = -1,25
