1. - 3x + 8 = 4
- 3x = 4 - 8
- 3x = - 4
x = 4/3
V: - 3 × 4/3 + 8 = - 4 + 8 = 4
4. 2 × |2x + 3| - 9 = 5
2 × |2x + 3| = 5 + 9
2× |2x + 3| = 14
|2x + 3| = 14 : 2
|2x + 3| = 7
2x + 3 = 7
2x = 7 - 3
2x = 4
x = 4 : 2
x = 2
2x + 3 = - 7
2x = - 7 + 3
2x = - 10
x = - 10 : 2
x = - 5
5. x - 4/3 - 1 = x + x + 3/2 - 1/3 / : 6
2( x - 4 ) - 6 = 6x + 3( x + 3 ) - 2
2x - 8 - 6 = 6x + 3( x + 3 ) - 2
2x - 8 - 6 = 6x + 3x + 9 - 2
2x - 14 = 6x + 3x + 9 - 2
2x - 14 = 9x + 7
2x - 9x = 7 + 14
- 7x = 21
x = 21 : ( - 7 )
x = - 3