1) 3x + 7 = 03x = -7x = -7/3
2) 13 - 100x = 0100x = 13x = 13/100 = 0.13
3) 0.5x + 0.15 = 00.5x = -0.15x = -0.15/0.5 = -0.3
4) 8 - 0.8 = 08 = 0.8Уравнение не имеет решений.
1) 3x + 7 = 0
3x = -7
x = -7/3
2) 13 - 100x = 0
100x = 13
x = 13/100 = 0.13
3) 0.5x + 0.15 = 0
0.5x = -0.15
x = -0.15/0.5 = -0.3
4) 8 - 0.8 = 0
8 = 0.8
Уравнение не имеет решений.