Odpowiedź:
a)
- 2(2x - 1) = x/3
- 2 * 3(2x - 1) = x
- 6(2x - 1) = x
- 12x + 6 = x
- 12x - x = - 6
- 13x = - 6
13x = 6
x = 6/13
b)
2/5(3 - x) = - 2 | * 5
2(3 - x) = - 2 * 5
6 - 2x = - 10
- 2x = - 10 - 6
- 2x = - 16
2x = 16
x = 16/2 = 8
c)
1/5(x - 3) = 9 - x | * 5
x - 3 = 5(9 - x)
x - 3 = 45 - 5x
x + 5x = 45 + 3
6x = 48
x = 48/6 = 8
d)
0,6/2 + x = x + 1
0,3 + x = x + 1
x - x = 1 - 0,3
0 ≠ 0,7
Równanie sprzeczne
x ∈ ∅ (zbiór pusty)