Odpowiedź :
Zadanie
a)
2 - x + 3x = - 4x - 3
2 + 2x = -4x - 3 l-2; +4x
6x = -5 l :6
x = - 5/6
b)
10x + 15 - 4x - 2 - x = 10x - 2x - 4
5x + 13 = 8x - 4 l -13; -8x
-3x = -17 l ;(-3)
x = 17/3
x = 5 2/3
c)
3x - 4 - 2x = 16 l +4
x = 20
d)
- 6 + 4x = 5x + 4 l +6; -5x
- x = 10 l ·(-1)
x = -10
e)
- 8 + 7x + 3 = 5x + 4 + 4x + 5
7x - 5 = 9x + 9 l +5; -9x
-2x = 14 l :(-2)
x = -7