Răspunsuri

2014-09-02T19:59:45+03:00
1. x + 3 -7x - 35 = 4x + 4 - 2x - 12 + 12
x - 7x - 4x + 2x = 35 - 3 + 4 
- 8x = 36
x = - 36/8
x = - 9/2 = - 4 si 1/2
2.13x =  - 14
x = - 14/13
3. a) 3x = 14
x = 14/3
x = 4 si 2/3
b) 6x + 18 = 2x - 15
6x - 2x = - 18 - 15
4x = - 33
x = - 33/4
c) 13x = 39
x = 39/13
x = 3
d) 34x = 9 + 25
34x = 34
x = 1