Răspuns:
Explicație pas cu pas:
a) 14x - 7 - 12x + 3 = 15x + 10 - 1
2x - 4 = 15x + 9
2x - 15x = 13
-13x = 13 / *(-1)
13x = - 13
x = -13/13 = - 1
b) 11x + 22 - 4 + 10x = 24 + 32x + 5
21x + 18 = 32x + 29
21x - 32x = 11
- 11x = 11 / *(-1)
11x = - 11
x = -11/11 = - 1
c) 3 ( 2x + 8 - 3x + 15 ) + 4 ( 3x + 6 - 4x - 4 ) + 15
3 ( 23 - x ) + 4 ( 2 - x ) + 15
69 - 3x + 8 - 4x + 15 = - 7x + 92