1) 7x + 11,9 = 7x = - 11,x = -1,7
2) 6x - 0,8 = 3x + 2,6x - 3x = 2,2 + 0,3x = x = 1
3) 5x - (7x + 7) = 5x - 7x - 7 = -2x = 1x = -8
4) 6x - (2x - 5) = 2(2x + 46x - 2x + 5 = 4x + 4x + 5 = 4x + 5 = 8
Ответ: x = -1,7; x = 1; x = -8; нет решений.
1) 7x + 11,9 =
7x = - 11,
x = -1,7
2) 6x - 0,8 = 3x + 2,
6x - 3x = 2,2 + 0,
3x =
x = 1
3) 5x - (7x + 7) =
5x - 7x - 7 =
-2x = 1
x = -8
4) 6x - (2x - 5) = 2(2x + 4
6x - 2x + 5 = 4x +
4x + 5 = 4x +
5 = 8
Ответ: x = -1,7; x = 1; x = -8; нет решений.